Wilson rallied after losing the lead on the 10th hole, notching a total of four birdies over the last eight holes for a round of 5-under 67, finishing at 24-under 264.
Jeff Maggert registered an 8-under 64 to claim sole possession of fifth place at minus-21.
Play during Saturday's third round was suspended due to dangerous wind gusts at PGA West in California and resumed Sunday morning, followed by the final round.
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