1939 U.S. Open
The only blemish on Sam Snead's career is never winning the U.S. Open. In 1939, he had arguably his best chance to do it, needing a par 5 on the 72nd hole at Philadelphia C.C. to win. Snead, though, mistakenly thought he needed a birdie, played the hole aggressively and made a triple-bogey 8 to finish in fifth, with Byron Nelson winning.
AP Photo