Passer rating (known as
passing
efficiency or
pass efficiency in
NCAA football) is a measure of the performance
of
quarterbacks or any other passers in
American football and
Canadian football. There are at least two
formulae currently in use: one officially used by the
National Football League and the
Canadian Football League,
and one used in
college football.
Passer rating is calculated using each quarterback's completion
percentage, passing yardage,
touchdowns
and
interceptions.
NCAA
Passer rating, known formally in
college football as
passing efficiency or pass efficiency, is
based on player performances. The
NCAA passing
efficiency formula is far simpler
[51252]
than the NFL formula, as it lacks limits on the four
components:
Passer Rating_{NCAA} = {(8.4 \times YDS) + (330 \times TD) + (100
\times COMP) - (200 \times INT) \over ATT}
The NCAA passer rating has an upper limit of 1,261.6 (every attempt
is a 99-yard completion for touchdown), and a lower limit of -731.6
(every attempt is completed, but results in a 99-yard loss). A
passer who throws only interceptions will have a -200 rating, as
would a passer who only throws completed passes losing an average
of 35\tfrac{5}{7} yards.
NFL
The calculation of the NFL quarterback rating involves more steps
than the NCAA formula. In order to establish a maximum value for an
NFL player's passer rating, a separate calculation needs to be
completed involving each of the following four categories:
Completion Percentage, Average Yards Per Attempt, Percentage of
Touchdown Passes, and Percentage of Interceptions. If the result in
any category is less than 0, the given result should be 0. If the
result in any category is greater than 2.375, the given result
should be 2.375. This makes the maximum possible quarterback rating
for the NFL 158.3. A perfect rating requires at least a 77.5%
completion rate, at least 12.5 yards per attempt, a touchdown on at
least 11.875% of attempts, and no interceptions.
a = \left (\left ({COMP \over ATT} \times 100 \right ) - 30 \right
) \times .05
b = \left ({YARDS \over ATT} - 3 \right ) \times .25
c = \left ({TD \over ATT} \right ) \times 20
d = 2.375 - \left ({INT \over ATT} \times 25 \right )
Then use the above calculations to complete the passer
rating:
Passer Rating_{NFL} = {(a + b + c + d) \over 6} \times 100
This can be shown simplified as:
Passer Rating_{NFL} = \frac{25}{12} \times \left [ 1+40 \left
(\frac{COMP}{ATT}\right ) +2 \left (\frac{YARDS}{ATT}\right
)+160\left (\frac{TD}{ATT}\right )-200\left ( \frac{INT}{ATT}\right
)\right ]
Records
NFL
Steve Young
currently holds the NFL record for the highest career passer rating
for any player with at least 1500 attempts with a mark of 96.8. The
highest passer rating for a complete season is 121.1 set by
Peyton Manning in 2004. Also in 2004,
rookie
Ben Roethlisberger posted
a mark of 98.1, setting a record for first-year passers. There have
been
58 quarterbacks to complete a game with a perfect passer rating
of 158.3 (and only six to have accomplished this more than
once).
NCAA
In
NCAA Football Bowl
Subdivision (formerly division I-A), the career record for
passing efficiency is held by Ryan
Dinwiddie of Boise State
, who had a career mark of 168.9 between 2000 and
2003. The single-season record belongs to Colt Brennan of Hawaii
, who amassed
a passer rating of 186.0 over the 2006 season, while the freshman
record belongs to Michael Vick of
Virginia
Tech
, whose rating during the 1999 season was
180.4. Current
NCAA Football Bowl
Subdivision passing efficiency ratings can be found
here.
See also
References
External links and references
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