Leonard, also the 2000 and '01 winner at LaCantera Golf Club Resort Course, closed with a 5-under 65 to match Parnevik at 19-under 261. Parnevik, who opened with a 61 and led after each of the first three rounds, finished with a 69.

Leonard had plenty of opportunities to win before finally finishing off Parnevik for his 11th PGA Tour title and first since 2005.

On the final hole of regulation, the Texan's 14-foot birdie putt to win just slid by the hole. On the first extra hole, Parnevik took an unplayable lie after driving into the trees left of the fairway. But he hit a 153-yard approach to 3 feet to set up a par. Leonard chipped from the greenside rough to set up his par.

Leonard, 1-4 in playoffs after the victory, missed a 5-foot birdie putt on the second hole. Parnevik had a 28-footer for birdie to keep the playoff going on the third extra hole, but left it a foot short.

The 42-year-old Swede was trying to win for the first time in 6½ years.

Parnevik entered the round with a three-stroke lead over fellow Swede Mathias Gronberg and a four-shot margin over Leonard.

The finish brought back memories of the 1997 British Open when Parnevik began the final round at Troon five shots ahead of Leonard. But Parnevik shot a 71, and Leonard had a 65 to win.