The 33-year-old Mallinger had a 15-under 198 total at CordeValle after opening with a 66 and matching the course record with a 62 on Friday. He has finished second twice in his seven-year career on the tour, losing in a playoff to Bo Van Pelt in Milwaukee in 2009.
Sweden's Jonas Blixt was second after a 66, and Charles Howell III and Jason Kokrak were another stroke back at 12 under. Howell had a 66, and Kokrak shot 67.
Vijay Singh and Brazil's Alexandre Rocha were 11 under. They each shot 66.
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