Stricker, who led by six strokes entering the final round at the Riviera Country Club, finished the event at 16-under 268.
Luke Donald closed with a 66 and took second place two shots back at 270. Dustin Johnson (66) and J.B. Holmes (67) tied for third at 271.
Rain delays forced the tournament's second round to be completed a day late and some players had to complete the third round Sunday before beginning the final 18 holes.
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