MARANA, Ariz, -- All eight third-round matches have made the turn and players are building substantial leads in several of them.
The only match that is all square is Scott Piercy's bout with Steve Stricker, who turns 46 today. Stricker just birdied the 10th hole to even that match.
Defending champion Hunter Mahan is pulling away from former world No. 1 Martin Kaymer. He's made five birdies in his first eight holes and owns a 5-up advantage.
Robert Garrigus, who is trying to win the Accenture Match Play Championship in his first appearance, was 3 up on Fredrik Jacobson after making his fourth birdie of the day on No. 9. But Jacobson just won the par-5 11th with a birdie so the lead is 2 up.
Matt Kuchar hasn't trailed in his match with Nicolas Colsaerts -- setting the tone early with birdies on three of his first four holes to go 2 up. Another birdie at the eighth gave him a 4-up advantage but he bogeyed the ninth and now leads 3 up through 10.
Ian Poulter, who won the Accenture Match Play Championship in 2010, and Tim Clark started on the back nine. The Englishman has only made one birdie in nine holes but he's built a 3-up lead with pars on Nos. 16, 17 and 18.
In another battle from the Emerald Isle, Graeme McDowell is looking to make short work of Shane Lowry, who upset world No. 1 Rory McIlroy in the first round. He's made four birdies in his first nine holes and is 4 up through 10.
Jason Day is looking to eliminate the highest remaining seed in No. 2 Bubba Watson. The Aussie just won the eighth hole with a birdie and No. 9 with a par to go 3 up.
Webb Simpson birdied the first three holes of his match with Gonzalo Fernandez-Castano but only won one hole. He's just made the turn 3 up, though.