MARANA, Ariz. -- The latest on Saturday morning's four quarterfinal matches:

RYAN MOORE VS. LUKE DONALD -- Having just finished the front nine, Donald is in complete control, leading 4 up. He won the par-5 eighth with a 12-foot birdie putt after a terrific shot from a bunker 74 yards away, then won the ninth when Moore bogeyed.

MATT KUCHAR VS Y.E. YANG -- Kuchar is also 4 up through eight holes, with Yang losing the seventh and eight holes due to bogeys.

MARTIN KAYMER VS. MIGUEL ANGEL JIMENEZ -- Kaymer is 2 up through seven, with Jimenez losing the seventh with a bogey.

BUBBA WATSON VS. J.B. HOLMES -- Holmes has jumped out to a commanding 3-up advantage, having won two holes with birdies, then the fifth hole with a Watson bogey.