Hinkle won three tournaments in his career on the PGA Tour, all of which came in the late 1970s. In 1979, he earned $247,693, finished 3rd on the money list, and won two Tour events, including the World Series of Golf. That year in the first round of the U.S. Open at Inverness Club he took a shortcut, cutting the dogleg on the par-5 8th hole by hitting onto the 17th fairway. Overnight, USGA officials planted a tree (known ever afterwards as The Hinkle Tree) to block the shortcut.[1] His best finish in a major was a T-3 at both the U.S. Open and the PGA Championship in 1980.[2] During his career on the PGA Tour, he had more than 50 top-10 finishes. He also played on the European Tour occasionally. Though he never won he finished runner-up at the 1975 German Open and 1980 European Open.