Dufner drained the tournament-winning putt to finish with a 3-under 67, good for an 11-under 269 and his second PGA Tour win in three weeks.
Pride just missed his first victory since 1994 when he drove into the water on No. 18. He also posted a 67 to finish one back at minus-10.
Henry held a late lead until falling out of contention with a three-putt bogey on No. 17.
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