Jason Kokrak, who has not won in 110 PGA Tour starts, has upstaged the stars in the Northern Trust Open field through 36 holes, shooting a seven-under par 64 at Riviera Country Club in Pacific Palisades, Calif., to take a one-stroke lead.
Kokrak, 30, leads Chez Reavie by one, but is two up on both Dustin Johnson, who lost in a playoff last year, and Bubba Watson, the latter the winner of the event in 2014.
The potential Jordan Spieth-Rory McIlroy battle between the first and third-ranked players in the world never came close to materializing. Spieth, who shot a 79 in the first round, followed with a three-under par 68, but still missed the cut by five strokes. McIlroy, meanwhile, shot a two-under par 69 on Friday and is four behind Kokrak, as are Adam Scott and Charl Schwartzel.
First-round leader Camilo Villegas, who opened with a 63, followed with a three-over par 74 and is tied for 15th, five off the lead.