Billy Mayfair
- DOB : August 6, 1966 (1966-08-06) (age 42)Phoenix, Arizona
- Height : 5 ft 9 in (1.75 m)
- Weight : 195 lb (88 kg; 13.9 st)
- Nationality : United States
- Residence : Scottsdale, Arizona
- Career : College : Arizona State University
- Turned professional : 1988
- Current tour(s) : PGA Tour
- Professional wins : 5
About
- Number of wins by tour : PGA Tour : 5
- Best results in Major Championships : The Masters : T12: 1991
- U.S. Open : T5: 2002
- Open Championship : T3: 2001
- PGA Championship : T5: 1990
William Fred "Billy" Mayfair (born August 6, 1966) is an American PGA Tour golfer.Mayfair was born in Phoenix, Arizona, and now lives in Scottsdale, Arizona where he plays out of Estrella Mountain Range Golf Club. He went to Arizona State University and won the 1986 U.S. Amateur Public Links and the 1987 U.S. Amateur Championship where he beat Eric Rebmann 4&3.On July 31, 2006, Mayfair was diagnosed with testicular cancer. He had surgery on August 3 and it has been reported that the cancer was contained.
