Jason Dufner birdied seven of his final nine holes Saturday at La Quinta Country Club to take a two-stroke lead in the CareerBuilder Challenge.

Dufner finished with an 8-under 64 to reach 23-under 193 with one round left at PGA West's TPC Stadium Course. He opened with a 64 on Thursday on the Nicklaus Tournament Course for a share of the lead and had a 65 on Friday on the Stadium Course to take a one-stroke advantage.

Jamie Lovemark was second after a 65 on the Stadium Course. Phil Mickelson was tied for fifth at 17 under in his first start since the Presidents Cup in October. He had a bogey-free 66 at the Stadium Course, holing a flop shot for birdie on the 10th hole.