Height: 6 ft 0 in (1.83 m)
Weight: 200 lb (91 kg; 14 st)
Birthdate: November 9, 1949
College: University of Georgia
Year turned pro: 1972
Birthplace: Rochester, New York, USA
Born in Rochester, New York, in 1949, Diehl was still just fifteen years of age when he won an international log dive competition, having hit the ball a total of 340 yards. After high school, Diehl attended the University of Georgia where he played on the golf team and was All-American in 1969.
After turning professional in 1972, Diehl played on the PGA Tour where he finished in the top 10 on more than 20 occasions. These finishes included a Tour win at the San Antonio Texas Open, in 1974. Two years later Diehl was unlucky when he lost out to Tom Kite on the fifth extra hole of a play-off at the IVB-Bicentennial Golf Classic. During his time on the PGA Tour, Diehl’s best finish at a major came at the 1977 U.S. Open when he ended in a tie for 7th place.
Since leaving the Tour in 1983, Diehl has had a varied career, including working in promotions for the Tour, commentating, working as a club professional and working as a stockbroker. Diehl decided not to play on the Champions Tour as he and his wife Laura were going through the process of adopting their China born daughter Alexandra. Diehl also has four adult sons.
As of the end of 2014, Diehl had achieved one win on the PGA Tour, amassing total prize money of $404,584.