Brett Wetterich posted a five-under 66 on Sunday to move into the lead after three rounds of the Deutsche Bank Championship, the second event of the FedEx Cup Playoffs. Wetterich posted a 13-under-par 200 after 54 holes of this tournament, the only PGA Tour event with a scheduled Monday finish to take advantage of the Labor Day holiday. Arron Oberholser made a crazy par at the par-five closing hole at the TPC of Boston to cap off his five-under 66. He is alone in second place at 12-under 201. Despite the two at the top of the leaderboard, the focus will be squarely on the penultimate pairing on Monday. Phil Mickelson, in third at minus-11 after a 68 on Sunday, and Tiger Woods, the defending champion who is tied for fourth with Aaron Baddeley at 10-under par, will play together on Monday. Mickelson was steady all day, but Woods could have been even higher on the leaderboard had it not been for a balky putter late. At the par-four 17th, Woods hit a poor approach 50 feet short of the flag. He ran the birdie try seven feet past the hole and missed the par putt coming back. On the par-five closing hole, Woods had 62 feet for eagle and again ran his first putt well past the hole. The No. 1 player in the world again walked off angrily with back-to-back three-putts. "Ill just leave it as Im not very happy right now," acknowledged Woods, who shot a four-under 67 thanks to four birdies in a five-hole span around the turn. "Just bad speed. Just terrible speed." Mickelson was two-under through his first seven holes, thanks to three birdies and a bogey. He rattled off 10 pars in a row until the last when his drive landed in the left rough. Mickelson uncharacteristically laid up, then hit his third to two feet and tapped in to get within two of the lead. "I made a lot of unsure swings," admitted Mickelson. "With the driver, I felt great. I think I only missed two or three fairways. Playing from the fairway, I was able to make a lot of pars." This high-profile pair will attract most of the attention on Monday, but they have to catch their teammate from last years Ryder Cup. Wetterich tallied his first birdie at the second hole, then hit his drive to 10 feet to set himself up for a good look at eagle at the par-four fourth. Instead, Wetterich two-putted for a birdie to tie for the lead at 10-under par. At the par-five seventh, Wetterich rolled in an 18-foot eagle putt to move two clear of the field. Wetterich ran home a five-foot birdie putt at the 10th and maintained his two-stroke lead. The advantage shrunk to one and Wetterich got a little off track with his driver. He missed the fairway at 14 and made par, but missed the short grass and green at the 15th. Hardly mattered to Wetterich as he holed out his chip for a birdie. Wetterich landed on the fringe at the par-three 16th and blew his birdie putt five feet past the hole. He missed the comeback putt for par to watch his lead fall back to one. At the closing hole, Wetterich slightly pulled his second and chipped his third to six feet. His birdie putt stayed above ground, but last years Byron Nelson winner still has the 54-hole lead. "Im out here to win," said Wetterich. "I was not on the radar screen two years ago. Everything turned around for me a year and a half ago. I do have to pinch myself every now and then." Oberholser was one back in the fairway at 18 and hit an awful second shot that almost came up short of the hazard, but eventually bounced into the mess. He took a drop and hit his fourth to 19 feet. Oberholser made that putt for par to stay within one. Oberholser needs a big finish to secure his place in the field next week at the BMW Championship since the field will have the top 70 on the FedEx Cup Playoffs points list after Monday. Oberholser is 67th and will most likely hang on to his spot, but knows he needs some improvement. "If Im going to win tomorrow, Im going to have to strike the ball a little bit better than I have been," said Oberholser, whose only win came last year at Pebble Beach. Reigning U.S. Open champion Angel Cabrera (65) and first-round leader Camilo Villegas (69) share sixth place at minus-nine. Jason Gore (64), Bart Bryant (67), Lucas Glover (66), John Senden (67), Rory Sabbatini (70) and FedEx Cup Playoff points leader and last weeks winner at The Barclays Steve Stricker (69) are tied for eighth place at eight-under 205. Rich Beem, who shared the overnight lead with Baddeley and Mike Weir, birdied the last, but shot a two-over 73 and is tied for 14th at minus-seven. Weir was one stroke worse and is tied for 21st.