San Martin: American Jimmy Walker closed with a five-under 66 to capture the Frys.com Open and record his first PGA Tour victory.
Walker on Sunday had to come from behind to beat Vijay Singh by two strokes as he finished at 17-under par 267.
The win came in his 188th PGA Tour start.
Fiji`s Singh posted a three-under 68 to grab second place at minus-15 at the CordeValle Golf Club.
That was Singh`s best tour finish since finishing runner-up at the 2011 Northern Trust Open.
Third-round leader Brooks Koepka stumbled to a one-over 72.
He was joined in third place at 14-under-par 270 by Kevin Na (64), Scott Brown (64) and Hideki Matsuyama (66).
George McNeill (71) and Brian Harman (65) shared seventh place at minus-13, while Will MacKenzie (69), Billy Hurley (68) and Max Homa (69) were one shot back at 12-under-par 272.