William Earl Mehlhorn (December 2, 1898 – April 5, 1989) was an American golfer who played on the PGA Tour in its early days, and was at his best in the 1920s.

He was from Texas. He often wore cowboy hats on the course and was nicknamed "Wild Bill". He won 20 times on the PGA Tour, but did not win a major championship. Only a handful of golfers have won more often on the PGA Tour without claiming a major. He finished 14 times in the top-10 at majors. His best finish was runner-up to Walter Hagen at the 1925 PGA Championship. He played on the 1927 Ryder Cup team. His game was undermined by problems with putting: the yips.

PGA Tour wins (20)

• 1923 (2) Texas Open, Oklahoma Open
• 1924 (1) Western Open
• 1926 (5) Long Beach Open, South Central Open, South Florida Open Championship, Santa Clara Valley Open, San Jose Open
• 1927 (1) San Jose Open
• 1928 (6) Long Beach Open (tie with Leo Diegel), Texas Open, Richmond Open, Montauk Open, Westchester Open, Hawaiian Open
• 1929 (4) El Paso Open, Texas Open, South Central Open, Metropolitan Open
• 1930 (1) La Gorce Open

Other wins

• 1924 Miami International Four-Ball (with Macdonald Smith)
• 1926 Miami International Four-Ball (with Macdonald Smith)

Results in major championships

Tournament	1919	1920	1921	1922	1923	1924	1925	1926	1927	1928	1929
The Masters	NYF	NYF	NYF	NYF	NYF	NYF	NYF	NYF	NYF	NYF	NYF
U.S. Open	WD	T27	DNP	4	T8	3	T15	T3	5	T49	T55
The Open Championship	NT	DNP	T16	DNP	DNP	DNP	DNP	T8	CUT	T9	T36
PGA Championship	T17	T9	DNP	DNP	DNP	T17	2	DNP	T17	T17	T9

Tournament	1930	1931	1932	1933	1934	1935	1936	1937
The Masters	NYF	NYF	NYF	NYF	WD	T35	DNP	T33
U.S. Open	T9	T4	T35	DNP	T37	DNP	DNP	T50
The Open Championship	DNP	DNP	DNP	DNP	DNP	DNP	DNP	DNP
PGA Championship	T17	T9	DNP	DNP	T17	DNP	T3	T33

NYF = Tournament not yet founded

NT = No tournament

DNP = Did not play

WD = Withdrew

CUT = missed the half-way cut

"T" indicates a tie for a place

Yellow background for top-10

See also

• Golfers with most PGA Tour wins