In baseball, a walk-off home run is a home run that ends the game. It must be a home run that gives the home team the lead (and consequently, the win) in the bottom of the final inning of the game—either the ninth inning, or any extra inning, or any other regularly scheduled final inning. It is called a "walk-off" home run because the teams walk off the field immediately afterward.

History and usage of the term

Although the concept of a game-ending home run is as old as baseball, the adjective "walk-off" only attained widespread use in the late 1990s and early 2000s. The first known usage of the word in print appeared in the San Francisco Chronicle on April 21, 1988, Section D, Page 1. Chronicle writer Lowell Cohn wrote an article headlined "What the Eck?" about Oakland reliever Dennis Eckersley's unusual way of speaking: "For a translation, I go in search of Eckersley. I also want to know why he calls short home runs 'street pieces,' and home runs that come in the last at-bat of a game 'walkoff pieces'. . . ." Although the term originally was coined with a negative connotation, in reference to the pitcher (who must walk off the field with his head hung in shame), it has come to acquire a more celebratory connotation, for the batter who walks off with pride with the adulation of the home crowd).

Sportscasters also use the term "walk-off hit" if any kind of hit drives in the winning run to end the game. The terms walk-off hit by pitch, "walk-off walk" (a base on balls with the bases loaded), walk-off wild pitch, walk-off reach-on-error, and walk-off balk have been also applied, and the latter has been dubbed a "balk-off," though some people say that winning a game on such technicalities doesn't merit a term normally used to describe a clutch hit. It is a separate stretch of the term to call a hit a "walk-off" when what ends the game is not the hit but the defense's failure to make a play (as in a single with a possible out at the plate). The day after Eric Bruntlett pulled off a game-ending unassisted triple play for the Philadelphia Phillies against the New York Mets on August 23, , the Philadelphia Daily News used the term "walkoff triple play" in a subheadline describing the moment.

As of 2006, on 23 occasions in major league history, all during the regular season, a player has hit a walk-off grand slam for a 1-run victory; 14 of those occasions came with two outs. Some baseball observers call this an "ultimate grand slam". This website lists all "ultimate grand slams", including those which occurred with two outs. Note that Chris Hoiles' grand slam occurred with the cliché situation: two outs, full count, bottom of the ninth inning, and down by three runs.

In a rare occurrence, only four pitchers in Major League history have surrendered two game-ending grand slam home runs in one season, according to the Elias Sports Bureau:

• Satchel Paige of the St. Louis Browns, in , to Sammy White of the Boston Red Sox on June 30, and Eddie Joost of the Philadelphia Athletics on July 15.
• Lindy McDaniel of the Chicago Cubs, in , to Bob Aspromonte of the Houston Colt .45s on June 11, and Jim Hickman of the New York Mets on August 9.
• Lee Smith of the California Angels, in , to Mark McGwire of the Oakland Athletics, on June 30, and Albert Belle of the Cleveland Indians on July 18.
• Francisco Rodríguez of the New York Mets, in , to rookies Everth Cabrera of the San Diego Padres, on August 7, and Justin Maxwell of the Washington Nationals on September 30. Rodríguez is the only pitcher to surrender two walk-off grand slams to two rookies.

Relevant rules

The rules of baseball provide that:

• A batter is entitled to a home run only "when he shall have touched all bases legally." (Rule 6.09(d); also 7.05(a))
• A batter is out, on appeal, for failing to touch each base in order or for passing a preceding runner. In some cases, all runs that score are negated. (Rule 7.10 and 7.12)
• On a walk-off hit, a batter is credited for the full number of bases only if "the batter runs out his hit." (Rule 10.06(f))
• A walk-off home run is allowed to complete before the game ends. (Rule 4.11(c), Exception; also 10.06(g))

The first point above was problematic in the 1976 ALCS. Mark Littell of the Kansas City Royals was the pitcher and Chris Chambliss of the New York Yankees hit the home run that won the pennant. Yankee fans ran onto the field at Yankee Stadium and impeded Chambliss from rounding the bases. Chambliss had to negotiate a sea of fans to place his foot in the area of home plate. Announcer Bill White, on WMCA radio in New York, yelled into the microphone, in a voice of disbelief, "...and the game...I THINK...is over!"

The third point above led to Robin Ventura's "Grand Slam Single" in the 1999 NLCS. In the bottom of the 15th inning, the New York Mets tied the score against the Atlanta Braves at 3–3. Ventura came to bat with the bases loaded, and hit a walk-off grand slam to deep right. Roger Cedeño scored from third and John Olerud appeared to score from second, but Todd Pratt, on first base when Ventura hit the home run, went to second, then turned around and hugged Ventura, as the rest of the team piled onto the field. The official ruling was that because Ventura never advanced past first base, it was not a home run but a single, and thus only Cedeño's run counted, making the official final score 4–3.

The fourth point above was not a rule prior to 1920; instead, the game ended at the moment the winning run scored. This rule affected the scoring of 40 hits, from 1884 to 1918, that would now be scored as walk-off home runs.

Postseason and All-Star Game

World Series

In the charts below, home runs that ended a postseason series are denoted by the player's name in bold. Home runs in which the winning team was trailing at the time are denoted by the final score in bold.

Follow the linked year on the far left for detailed information on that series.

Year	Game	Batter	Site	Pitcher	Situation	Final score	Series standing	Notes
1949	Game 1, October 5	Tommy Henrich, N.Y. Yankees	Yankee Stadium	Don Newcombe, Brooklyn	0–0, 9th 0 out 0 on	1–0	1–0 NY	Henrich's blast leading off the 9th was the first walk-off home run in Series history, and provided the game's only run.
1954	Game 1, September 29	Dusty Rhodes, N.Y. Giants	Polo Grounds	Bob Lemon, Cleveland	2–2, 10th 1 out 2 on	5–2	1–0 NY	Rhodes' 3-run pinch-hit homer with 1 out in the 10th is not as well remembered as Willie Mays' spectacular over-the-shoulder catch earlier in the game.
1957	Game 4, October 6	Eddie Mathews, Milwaukee	County Stadium	Bob Grim, N.Y. Yankees	5–5, 10th 1 out 1 on	7–5	2–2	Mathews hits a 2-run shot with 1 out in the 10th inning to tie the Series.
1960	Game 7, October 13	Bill Mazeroski, Pittsburgh	Forbes Field	Ralph Terry, N.Y. Yankees	9–9, 9th 0 out 0 on	10–9	4–3 Pit	Leading off the 9th, Mazeroski homers to end the Series, giving the Pirates their first championship since 1925. It is still the only Game 7 walk-off home run in World Series history. After Forbes Field was demolished, the section of the left-field wall where the home run left the park was moved to the Pirates' new home of Three Rivers Stadium, and still later was moved to their current home, PNC Park. A line of bricks marks that section of the wall, next to a preserved wall section, and a plaque indicating the spot where Mazeroski's homer left the park is embedded in the current sidewalk.
1964	Game 3, October 10	Mickey Mantle, N.Y. Yankees	Yankee Stadium	Barney Schultz, St. Louis	1–1, 9th 0 out 0 on	2–1	2–1 NY	Mantle slugs the first pitch in the 9th out of the park for a Yankee victory.
1975	Game 6, October 21	Carlton Fisk, Boston	Fenway Park	Pat Darcy, Cincinnati	6–6, 12th 0 out 0 on	7–6	3–3	Fisk's thrilling home run to lead off the 12th inning, high off the left-field foul pole above the Green Monster, ties the Series in one of the best remembered moments in the sport's history. The homer arguably changed the way televised sports are covered; because camera operators missed a cue from the producer, the camera lingered on Fisk trying to "wave his home run fair." This image of Fisk proved so dramatic that "reaction shots" became standard fare in sports broadcasting.
1988	Game 1, October 15	Kirk Gibson, Los Angeles	Dodger Stadium	Dennis Eckersley, Oakland	3–4, 9th 2 out 1 on	5–4	1–0 LA	The injured and hobbling Gibson, later named the NL MVP, makes his only Series appearance with a pinch-hit, 2-run, 2-out shot for the underdog Dodgers, marking the first walk-off Series homer by a team that trailed at the time. Oakland's José Canseco had provided all his team's scoring with a 2nd-inning grand slam. Jack Buck, who called the game for CBS Radio, exclaimed "I don't believe what I just saw!" as Gibson circled the bases.
1988	Game 3, October 18	Mark McGwire, Oakland	Oakland-Alameda County Coliseum	Jay Howell, Los Angeles	1–1, 9th 1 out 0 on	2–1	2–1 LA	McGwire's home run with 1 out gives Oakland its only win in the Series. It is the first time that two walk-off home runs are hit in the same postseason series.
1991	Game 6, October 26	Kirby Puckett, Minnesota	Hubert H. Humphrey Metrodome	Charlie Leibrandt, Atlanta	3–3, 11th 0 out 0 on	4–3	3–3	Puckett, who had made a game-saving defensive play earlier in this game, leads off the 11th inning with a homer to tie the Series, as Jack Buck told the nation on CBS, "We'll see you... tomorrow night!" In addition, Puckett falls a double short of hitting for the cycle, getting two singles, a triple, and the homer.
1993	Game 6, October 23	Joe Carter, Toronto	SkyDome	Mitch Williams, Philadelphia	5–6, 9th 1 out 2 on	8–6	4–2 Tor	Carter hits a 3-run homer with 1 out to give Toronto its second consecutive championship; unlike the Pirates in 1960, the Blue Jays were trailing at the time but were not facing elimination.
1999	Game 3, October 26	Chad Curtis, N.Y. Yankees	Yankee Stadium	Mike Remlinger, Atlanta	5–5, 10th 0 out 0 on	6–5	3–0 NY	Curtis leads off the 10th inning with his second home run of the evening to give the Yankees a commanding Series lead.
2001	Game 4, October 31	Derek Jeter, N.Y. Yankees	Yankee Stadium	Byung-Hyun Kim, Arizona	3–3, 10th 2 out 0 on	4–3	2–2	Jeter's homer with 2 out in the 10th ties the Series in the first-ever Series at-bat by any player in the month of November (just after midnight on November 1); the series had been delayed because of the September 11, 2001 attacks. It also gave him the nickname of "Mr. November".
2003	Game 4, October 22	Álex González, Florida	Pro Player Stadium	Jeff Weaver, N.Y. Yankees	3–3, 12th 0 out 0 on	4–3	2–2	González, who had 5 hits in 53 at-bats in the postseason and 1 hit in 13 at-bats in the World Series, hits a home run on a full count to lead off the 12th inning, tying the Series and shifting momentum to Florida for the remainder of the Series.
2005	Game 2, October 23	Scott Podsednik, Chi. White Sox	U.S. Cellular Field	Brad Lidge, Houston	6–6, 9th 1 out 0 on	7–6	2–0 Chi	After Paul Konerko hits a grand slam to give Chicago a 6–4 lead in the 7th, and Houston ties it in the 9th, Podsednik, who had not homered in 129 games in the regular season, hits one to right-center with 1 out to win it.

Other postseason series

League Division Series

Year	Game	Batter	Site	Pitcher	Situation	Final score	Series standing	Notes
1981 NLDS	Game 1, October 6	Alan Ashby, Houston	Astrodome	Dave Stewart, Los Angeles	1–1, 9th 2 out 1 on	3–1	1–0 Hou	With two out in the 9th, Ashby wins it with a two-run shot after Nolan Ryan pitches a 2-hitter.
1981 NLDS	Game 4, October 10	George Vukovich, Philadelphia	Veterans Stadium	Jeff Reardon, Montreal	5–5, 10th 0 out 0 on	6–5	2–2	Vukovich pinch-hits a 2–0 pitch to right field leading off the 10th inning, tying the series.
1995 ALDS	Game 1, October 3	Tony Peña, Cleveland	Jacobs Field	Zane Smith, Boston	4–4, 13th 2 out 0 on	5–4	1–0 Cle	In a 5-hour game delayed twice by rain, Peña hits a 2-out shot in the 13th inning at 2:08 AM to win; it is Boston's 11th consecutive postseason loss, and Cleveland's first postseason win since the 1948 World Series. The longest game to date in postseason history, it holds the record for only one day.
1995 ALDS	Game 2, October 4	Jim Leyritz, N.Y. Yankees	Yankee Stadium	Tim Belcher, Seattle	5–5, 15th 1 out 1 on	7–5	2–0 NY	With one out in the 15th inning, Leyritz hits a 2-run homer to right. At 5 hours 13 minutes, it breaks the record set one day earlier for the longest postseason game.
1999 NLDS	Game 4, October 9	Todd Pratt, N.Y. Mets	Shea Stadium	Matt Mantei, Arizona	3–3, 10th 1 out 0 on	4–3	3–1 NY	Pratt, substituting for an injured Mike Piazza, hits a home run to center field with one out in the 10th to win the series; Steve Finley nearly makes a leaping catch, but the ball just clears his glove.
2000 NLDS	Game 3, October 7	Benny Agbayani, N.Y. Mets	Shea Stadium	Aaron Fultz, San Francisco	2–2, 13th 1 out 0 on	3–2	2–1 NY	With one out in the 13th, Agbayani homers to left-center to end a 5 hour 22 minute contest. Barry Bonds popped up with two men on in the top of the inning, ending a Giants threat.
2003 ALDS	Game 3, October 4	Trot Nixon, Boston	Fenway Park	Rich Harden, Oakland	1–1, 11th 1 out 1 on	3–1	2–1 Oak	With one out in the 11th, pinch-hitter Nixon slams a 1–1 pitch to center field for a game-winning 2-run homer.
2004 NLDS	Game 2, October 7	Rafael Furcal, Atlanta	Turner Field	Dan Miceli, Houston	2–2, 11th 2 out 1 on	4–2	1–1	With two out in the 11th, Furcal hits a 2-run HR to right field on a 1–2 pitch to even the series.
2004 ALDS	Game 3, October 8	David Ortiz, Boston	Fenway Park	Jarrod Washburn, Anaheim	6–6, 10th 2 out 1 on	8–6	3–0 Bos	Washburn enters the game with two out in the 10th, and Ortiz smashes his first pitch to left field for a 2-run homer to win the series for the Red Sox. Vladimir Guerrero had tied the game for the Angels with a grand slam in the 7th.
2005 NLDS	Game 4, October 9	Chris Burke, Houston	Minute Maid Park	Joey Devine, Atlanta	6–6, 18th 1 out 0 on	7–6	3–1 Hou	Burke homers to left field on a 2–0 pitch with one out in the 18th inning, sending the Astros to the NLCS for the second year in a row. Nearly six hours long, it is the longest game by both innings and time in postseason history, surpassing the 16-inning Game 6 (the final game) of the 1986 NLCS and the 5:49 14-inning game 4 of the previous year's ALCS noted above.
2007 ALDS	Game 2, October 5	Manny Ramírez, Boston	Fenway Park	Francisco Rodriguez, L.A. Angels	3–3, 9th 2 out 2 on	6–3	2–0 Bos	With two out in the bottom of the 9th inning and two men on base, Ramírez slams a 1–0 pitch over the Green Monster, over the seats behind it, and onto Lansdowne Street behind Fenway Park.
2009 ALDS	Game 2, October 9	Mark Teixeira, N.Y. Yankees	Yankee Stadium	Jose Mijares, Minnesota	3–3, 11th 0 out 0 on	4–3	2–0 NYY	With nobody out and nobody on in the bottom of the 11th, Teixeira lined a 2-1 pitch down the left field line that bounced off the top of the wall and landed in the first row of seats to give the Yankees a 4-3 win and a 2-0 series lead.

League Championship Series

Year	Game	Batter	Site	Pitcher	Situation	Final score	Series standing	Notes
1973 NLCS	Game 1, October 6	Johnny Bench, Cincinnati	Riverfront Stadium	Tom Seaver, N.Y. Mets	1–1, 9th 1 out 0 on	2–1	1–0 Cin	Seaver sets an NLCS record with 13 strikeouts and drives in the Mets' only run, but makes two costly mistakes in Pete Rose's game-tying homer in the 8th and Bench's winning shot with one out in the 9th.
1973 ALCS	Game 3, October 9	Bert Campaneris, Oakland	Oakland-Alameda County Coliseum	Mike Cuellar, Baltimore	1–1, 11th 0 out 0 on	2–1	2–1 Oak	Campaneris hits the second pitch of the 11th inning over the left field wall; it is only the fourth hit allowed by Cuellar.
1976 ALCS	Game 5, October 14	Chris Chambliss, N.Y. Yankees	Yankee Stadium	Mark Littell, Kansas City	6–6, 9th 0 out 0 on	7–6	3–2 NY	After George Brett ties the game with a 3-run shot in the 8th, Chambliss brings the Yankees their first pennant in 12 years with a homer to right on the first pitch of the 9th inning. A flood of fans then storms the field in a virtual riot; Chambliss is surrounded as he rounds first base, and has to reach out to touch second, which has been torn out by a fan. He never reaches third, but teammates later have him return to step in the general area of home plate. Damages are estimated at $100,000.
1979 ALCS	Game 1, October 3	John Lowenstein, Baltimore	Memorial Stadium	John Montague, California	3–3, 10th 2 out 2 on	6–3	1–0 Bal	With two out in the 10th, Lowenstein pinch-hits a 2-strike pitch to left for a 3-run homer.
1984 NLCS	Game 4, October 6	Steve Garvey, San Diego	Jack Murphy Stadium	Lee Smith, Chi. Cubs	5–5, 9th 1 out 1 on	7–5	2–2	With one out in the 9th, Garvey hits a fastball to right-center for a 2-run homer, his fourth hit of the day with 5 RBI; he has a record 20 career RBI in the league playoffs.
1985 NLCS	Game 5, October 14	Ozzie Smith, St. Louis	Busch Memorial Stadium	Tom Niedenfuer, Los Angeles	2–2, 9th 1 out 0 on	3–2	3–2 StL	Smith shocks the crowd with a 1-out homer down the right field line on a 1–2 pitch. He has had 13 career homers in eight seasons, but this is his first ever when batting from the left side. The call, by KMOX and longtime Cardinals announcer Jack Buck, implores the fans to "Go crazy, folks! Go crazy!"
1986 NLCS	Game 3, October 11	Lenny Dykstra, N.Y. Mets	Shea Stadium	Dave Smith, Houston	4–5, 9th 1 out 1 on	6–5	2–1 NY	With one out in the 9th, Dykstra hits an 0–1 pitch for a 2-run homer to right field. It is the first time in postseason history that a walk-off homer is hit by a team which is trailing.
1996 ALCS	Game 1, October 9	Bernie Williams, N.Y. Yankees	Yankee Stadium	Randy Myers, Baltimore	4–4, 9th 0 out 0 on	5–4	1–0 NY	In one of the most controversial postseason games in history, Williams leads off the 11th with a game-winning homer. The Yankees had tied the game at 4–4 in the 8th inning when a 12-year-old fan reached over the right field wall and pulled a fly ball hit by Derek Jeter into the stands; umpire Rich Garcia ruled it a home run, but conceded his mistake after seeing a replay.
1999 ALCS	Game 1, October 13	Bernie Williams, N.Y. Yankees	Yankee Stadium	Rod Beck, Boston	3–3, 10th 0 out 0 on	4–3	1–0 NY	After Beck enters the game to begin the 10th, Williams homers to center on his second pitch, becoming the first player to hit two walk-off home runs in postseason play.
1999 NLCS	Game 5, October 17	Robin Ventura, N.Y. Mets	Shea Stadium	Kevin McGlinchy, Atlanta	3–3, 15th 1 out 3 on	4–3	3–2 Atl	The Mets tie the score at 3–3 with a bases-loaded walk with one out in the 15th, bringing up Ventura, who with 13 career grand slams is tied for the lead among active players with Harold Baines and Mark McGwire. He comes through with the first walk-off grand slam—and the first grand slam in extra innings—in postseason history, clearing the center-right field wall and forcing Game 6, but is officially credited with only a 1-run single after being mobbed by teammates upon passing first base.
2001 ALCS	Game 4, October 21	Alfonso Soriano, N.Y. Yankees	Yankee Stadium	Kazuhiro Sasaki, Seattle	1–1, 9th 1 out 1 on	3–1	3–1 NY	With one out in the 9th, Soriano hits a 2-run shot to center field to bring the Yankees within a victory of their fourth straight pennant.
2003 ALCS	Game 7, October 16	Aaron Boone, N.Y. Yankees	Yankee Stadium	Tim Wakefield, Boston	5–5, 11th 0 out 0 on	6–5	4–3 NY	After a managerial decision (later subject to much second-guessing) to leave starter Pedro Martínez in the game allows the Yankees to tie it, Boone homers to left on the first pitch of the 11th inning to give the Yankees their sixth pennant in eight years.
2004 ALCS	Game 4, October 17	David Ortiz, Boston	Fenway Park	Paul Quantrill, N.Y. Yankees	4–4, 12th 0 out 1 on	6–4	3–1 NY	With none out in the 12th, Ortiz hits a 2-run shot to right on a 2–1 pitch to keep Boston's hopes alive in the series; coming only 10 days after his game winning shot against the Angels, he is the first player to hit two walk-off homers in the same postseason. It is the Red Sox's first win in their historic ALCS comeback against the Yankees. Later that day (the game ended after midnight), Ortiz will hit a walk-off single in the 14th, leading him subsequently to be named series MVP.
2004 NLCS	Game 5, October 18	Jeff Kent, Houston	Minute Maid Park	Jason Isringhausen, St. Louis	0–0, 9th 1 out 2 on	3–0	3–2 Hou	With one out in the 9th, Kent hits a 3-run homer to left field on the first pitch for the game's only scoring, bringing the Astros within a victory of their first pennant.
2004 NLCS	Game 6, October 20	Jim Edmonds, St. Louis	Busch Memorial Stadium	Dan Miceli, Houston	4–4, 12th 1 out 1 on	6–4	3–3	In the very next game of the Astros-Cardinals series, Edmonds hits a 2-run homer to right field on an 0–1 pitch with one out in the 12th, tying the series. Miceli becomes the first pitcher to surrender two walk-off homers in the same postseason.
2006 ALCS	Game 4, October 14	Magglio Ordóñez, Detroit	Comerica Park	Huston Street, Oakland	3–3, 9th 2 out 2 on	6–3	4–0 Det	With two outs in the bottom of the ninth, after back-to-back two-out singles by Craig Monroe and Plácido Polanco, Ordóñez crushes a 1–0 fastball high over the left-field bullpen to complete a Tigers sweep, giving them their first pennant in 22 years.

All-Star Game

Year	Batter	Date and Site	Pitcher	Final score	Notes
	Ted Williams, AL (Boston)	July 8, Briggs Stadium	Claude Passeau, NL (Chicago)	7–5	With two men on and the AL one out away from defeat, Williams hits a 1–1 pitch off the right field press box for the junior circuit's sixth win in nine contests. He later says, "I just shut my eyes and swung." It is the first All-Star game to be decided in the final inning.
	Stan Musial, NL (St. Louis)	July 12, Milwaukee County Stadium	Frank Sullivan, AL (Boston)	6–5	After being down 5–0 in the 7th inning, Musial's home run to right field on the first pitch of the 12th inning completes the NL's comeback; it is their fifth win in six years.
	Johnny Callison, NL (Philadelphia)	July 7, Shea Stadium	Dick Radatz, AL (Boston)	7–4	With 2 on and 2 out in the 9th, Callison wins the game with a homer to right field. Willie Mays had tied the score earlier in the inning with a walk, stolen base, and run on Orlando Cepeda's single. It is the NL's sixth win in the last seven decided games.

Regular season (selected examples)

Year	Batter	Date and Site	Pitcher	Final score	Notes
1881	Roger Connor, Troy Trojans	September 10, Albany	pitcher, Worcester	8–7	Trailing 7–4 with the bases loaded and two out in the bottom of the 9th, Connor hits the first grand slam in major league history for an 8–7 victory.
	Gabby Hartnett, Chi. Cubs	September 28, Wrigley Field	Mace Brown, Pittsburgh	6–5	Hartnett's "Homer in the Gloamin'" puts the Cubs in first place over the Pirates. The Cubs would win the pennant three days later.
	Bobby Thomson, N.Y. Giants	October 3, Polo Grounds	Ralph Branca, Brooklyn	5–4	Thomson's "Shot Heard 'Round the World" gives the Giants a pennant-winning victory over the Dodgers in the finale of a 3-game playoff.
	Roberto Clemente, Pittsburgh	July 25, Forbes Field	Jim Brosnan, Chi. Cubs	9–8	Clemente hits the only walk-off inside-the-park grand slam in the history of Major League Baseball.
	Hank Aaron, Milwaukee	September 23, Milwaukee County Stadium	Billy Muffett, St. Louis	4–2	Aaron's 2-out, 2-run shot in the bottom of the 11th clinches the Braves' first pennant since moving to Milwaukee.
	Joe Adcock, Milwaukee	May 26, Milwaukee County Stadium	Harvey Haddix, Pittsburgh	1–0	Adcock's 3-run homer in the 13th inning (officially ruled a double due to a baserunning mistake) spoils Haddix' no-hitter. Haddix had had a perfect game going into the 13th.
	Harold Baines, Chi. White Sox	May 9, Comiskey Park	Chuck Porter, Milwaukee	7–6	Baines' home run defeats the Brewers 7–6 in the 25th inning—the longest completed game in major league history, it took 8 hours 6 minutes, over two evenings, to complete.
	Mark Smith, Pittsburgh	July 12, Three Rivers Stadium	John Hudek, Houston	3–0	Smith's "no-hitter home run" in the 10th secures the names of Francisco Córdova and Ricardo Rincón in history as the first pitchers to combine for a joint, extra-innings no-hitter.
	Scott Hatteberg, Oakland	September 4, Oakland Coliseum	Jason Grimsley, Kansas City	12–11	Hatteberg's home run gives the A's their 20th straight win, an American League record, after they blow an 11–0 lead.
	Bill Mueller, Boston	July 24, Fenway Park	Mariano Rivera, N.Y. Yankees	11–10	Mueller's two run shot caps a comeback which saw the Red Sox trailing their chief rivals 9–4 going into the bottom of the sixth inning when they scored 4 in the sixth and 3 in the ninth with a Yankee run in between.
	Steve Finley, Los Angeles	October 2, Dodger Stadium	Wayne Franklin, San Francisco	7–3	Finley's grand slam clinches the NL West title for the Dodgers.
	Adam Dunn, Cincinnati	June 30, Great American Ballpark	Bob Wickman, Cleveland	9–8	Dunn's grand slam caps a comeback which saw the Reds trailing their state rivals 7–0 going into the bottom of the 8th when they scored 4 in the 8th and 5 in the 9th with an Indian run in between.
	Nomar Garciaparra, L.A. Dodgers	September 18 Dodger Stadium	Rudy Seanez San Diego	11–10	With Los Angeles trailing San Diego by a half game in the N.L. West and 9–5 in the bottom of the ninth with two weeks left in the regular season, the Dodgers hit four consecutive home runs in the 9th to tie the score. Trailing 10–9 in the bottom of the 10th, Garciaparra hits a walk-off two run home run to give Los Angeles an 11–10 win and a half game lead over San Diego. Both teams go on to make the playoffs.
2007	Alex Rodriguez, N.Y. Yankees	April 7, Yankee Stadium	Chris Ray, Baltimore	10–7	Rodriguez's feat ties Cy Williams and Vern Stephens for the most walk-off grand slams (three each) in major league history.
2007	Jim Thome, Chi. White Sox	September 16, U.S. Cellular Field	Dustin Moseley, L.A. Angels	9–7	Thome's two-run shot is his 500th career home run, making him the 23rd player to achieve the milestone. This marks the first time in history that a player has reached the 500-homer mark with a walk-off shot.
2007	Todd Helton, Colorado	September 18, Coors Field	Takashi Saito, L.A. Dodgers	9–8	Todd Helton's emotional bottom of the ninth 2-strike, 2-out walkoff home run keeps the Rockies alive in the bid for the wild card and National League West titles. The Rockies go on to win 21 of 22 games into the postseason, sweeping the Philadelphia Phillies in the NLDS and the Arizona Diamondbacks in the NLCS, and make their first World Series appearance in franchise history.
2008	Ryan Zimmerman, Washington	March 30, Nationals Park	Peter Moylan, Atlanta	3–2	Zimmerman's solo homer lets the Nationals christen their new stadium with a win.
2008	Miguel Tejada, Houston	April 7, Minute Maid Park	Kyle McClellan, St. Louis	5-3	In his first home game as an Astro, Tejada ended the game with a two-run homer in the ninth.
2008	Marlon Byrd, Texas Rangers	August 4, Rangers Ballpark in Arlington	Dámaso Marté, N.Y. Yankees	9–5	Marlon Byrd hit his first pitch from Dámaso Marté into the center field bleachers at Rangers Ballpark for a walk-off grand slam, ending a Rangers 10-game home losing streak to the Yankees.
2009	Alfonso Soriano, Chicago	July 27, Wrigley Field	Chris Sampson, Houston	5-1	Soriano's walk off grand slam in the 13th inning capped a 5-1 Cubs victory over the Astros as the Cubs maintained a 0.5 game lead on the St. Louis Cardinals.
2009	Alex Rodriguez, N.Y. Yankees	August 7, Yankee Stadium	Junichi Tazawa, Boston	2-0	Alex Rodriguez's 9th career walk-off home run into the visitors' bullpen broke a 0-0 tie in the bottom of the 15th inning against the Boston Red Sox. It also snapped a career-high streak of 72 at-bats without a home run for Rodriguez.
2009	Ryan Spilborghs, Colorado	August 25, Coors Field	Merkin Valdez, San Francisco	6-4	After the Giants had taken a 4-1 lead in the top of the 14th, Ryan Spilborghs hit a walk off grand slam in the bottom of the 14th inning, giving the Rockies a come-from-behind 6-4 victory over the San Francisco Giants. Colorado Rockies.
2009	Albert Pujols, St. Louis	August 28, Busch Stadium	Jason Bergmann, Washington	3-2	Pujols' 8th career walk-off in the 9th inning gave the Cardinals a come-from-behind win after Khalil Greene tied the score with a home run in the 8th inning. It was John Smoltz's first home game after signing with St. Louis a week earlier.
2009	Ryan Langerhans, Seattle	August 7, Safeco Field	J.P. Howell, Tampa Bay	7-6	Langerhans hit his first walk-off home run at any level, a 2-run homer to right field to win the game with two outs
2009	Ryan Langerhans, Seattle	August 29, Safeco Field	Craig Breslow, Oakland	4-2	Langerhans hit his second walk-off at any level and second in 18 days against the Oakland Athletics

Other leagues

Year	Batter	Event	Date and Site	Pitcher	Situation	Final score	Notes
	Rich Cominski, Morrisville, Pennsylvania	Little League World Series	August 26, Williamsport, Pennsylvania	Tommy Trotman, Merchantville, New Jersey	3–3, 7th Leadoff	4–3	Cominski leads off the 7th inning of the title game with a home run after the teams are tied following 6 regulation innings. Both batter and pitcher are regular catchers playing out of position—Cominski in right field due to an injured thumb, and Trotman due to the starter reaching the series limit for pitchers' innings. Cy Young threw out the first pitch of the tournament, two months before his death at age 88.
	Warren Morris, LSU	College World Series	June 8, Rosenblatt Stadium	Robbie Morrison, Miami	7–8, 9th 1 on, 2 out	9–8	Morris hits a two-out, two-run walk-off home run on the last pitch in the championship game, giving the LSU Tigers their 3rd CWS title; this is the only time the CWS has ended with a home run. It was also Morris' first and only home run of the season.
2005	Michael Memea, Ewa Beach, Hawaii	Little League World Series	August 28, Lamade Stadium	Christopher Garia, Willemstad, Curaçao	6–6, 7th Leadoff	7–6	Memea hits a walk-off solo home run in the bottom of the seventh inning of the championship game, giving Hawaii the title over the defending champions from Curaçao. Hawaii had only been put into position for the dramatic extra-inning win with a furious three-run rally in the bottom of the sixth.
2007	Deion Rosalia, Willemstad, Curaçao	Little League World Series	August 23, Volunteer Stadium	Reinaldo Amaro, Maracaibo, Venezuela	1–2, 7th 2 on, 2 out	4–2	In a semifinal of the International bracket, the Curaçao and Venezuela teams were tied 1–1 at the end of the regulation 6 innings. Venezuela's Bryan Charry led off the top of the seventh with a solo homer, staking them to a 2–1 lead. Curaçao had no one on with two out in their half of the seventh, but a single and walk set the table for Rosalia, who was down to his last strike before hitting his game-ending shot.
2007	Ryo Kanekubo, Tokyo, Japan	Little League World Series	August 25, Lamade Stadium	Rudson Pietersz, Willemstad, Curaçao	3–4, 6th 3 on, 1 out	7–4	Two days later, in the championship game of the international bracket, Curaçao becomes the victim of a walk-off shot. They take a 4–3 lead into the bottom of the sixth, but the Japan team responds by loading the bases for Kanekubo's shot, sending them to the title game the next day.
2007	Dalton Carriker, Warner Robins, Georgia	Little League World Series	August 26, Lamade Stadium	Junsho Kiuchi, Tokyo, Japan	2–2, 8th Leadoff	3–2	This time, the Japan team becomes a walk-off victim as Carriker hits a solo home run in the bottom of the eighth inning, giving the state of Georgia its second straight title and the U.S. a third straight title.

Notes

1. Walk-Off Grand Slams
2. CNNSI.com - Baseball - Ultimate Grand Slams - Saturday May 18, 2002 02:35 AM
3. 2008 Official Rules of Major League Baseball, ISBN 978-1-60078-106-3
4. 1996 Macmillan Baseball Encyclopedia, Appendix B (Decisions of the Special Baseball Records Committee)
5. http://sportsillustrated.cnn.com/baseball/mlb/2001/worldseries/news/2001/10/31/game_four_ap/ CNNSI.com
6. http://www.baseball-almanac.com/players/player.php?p=jeterde01 Baseball Almanac
7. Sporting News description and assertion of first combined extra-innings no hitter; Box score via Baseball Reference

External links

• Baseball-Reference.com Play Index - walk-off home runs which ended a postseason series