Daily Gallery: Worst collapses in golf history

With nine holes left to play in the 1966 U.S. Open, Arnold Palmer held a seven-shot lead on Billy Casper. Casper shot 32 on the final nine, while Palmer had three bogeys and two double-bogeys and the two were tied after 17 holes. Palmer and Casper tied the 18th and played an 18-hole playoff the next day.

Arnie held a two-shot lead with eight to go in the playoff but gave up six shots and losing to Casper by a total of four strokes.