|Full name||William James Mallon|
|Born||February 2, 1952|
Paterson, New Jersey
|Height||5 ft 10 in (1.78 m)|
|Weight||165 lb (75 kg; 11.8 st)|
|Sporting nationality||United States|
|Former tour(s)||PGA Tour|
|Best results in major championships|
|U.S. Open||53rd: 1977|
|The Open Championship||DNP|
William James Mallon (born February 2, 1952) is an American orthopedic surgeon, former professional golfer and a leading authority on the history of the Olympic Games.
Born in Paterson, New Jersey, Mallon studied at Duke University and graduated magna cum laude with an A.B. in math and physics. While at Duke he played collegiate golf and was a two-time All-American, twice voted to the Outstanding College Athletes of America and was a two-time participant in the NCAA tournament. He won over 40 amateur tournaments including two victories in both the Massachusetts and New England Amateur Championships and one Mid-Atlantic title.
Mallon turned professional in 1975 and joined the PGA Tour after qualifying at Q-school in the fall of 1975. He played four seasons, 1976–79, posting three top-10 finishes with a best finish of tied for 5th at the 1977 Joe Garagiola-Tucson Open. He played in the 1977 U.S. Open and was twice in the top 100 on the money list.
After leaving the PGA Tour he returned to Duke University to study medicine graduating as an M.D. in 1984. He was a resident at Duke University medical center between 1984 and 1990 and is now the Associate Consulting Professor of Orthopaedics as well as having his own practice. He specializes in complex reconstructive shoulder and elbow surgery and is a fellow of the American Academy of Orthopaedic Surgeons, a member of the American Shoulder and Elbow Surgeons, where he served as vice-president in 2012 and will be president in 2014, and a member of the advisory council of the Institute of Preventative Sports Medicine. He has written widely on the subject of sporting injuries and has been the medical editor of Golf Digest since 1987. Previously North American editor of the Journal of Shoulder and Elbow Surgery, he has been editor of that publication in 2009.
Mallon is also a leading authority on the history of the Olympic Games and has written 24 books on the subject. He was a co-founder and later president of the International Society of Olympic Historians and was historical consultant to the organizing committees of both the Atlanta and Sydney Olympics. Mallon has also been a consultant statistician to the IOC and was awarded the Olympic Order in silver in 2001 for services to the Olympic movement.