5:46 p.m. - Mark O'Meara won't go away. He pushed in an 8-foot birdie putt to fall to 13 under par. Olin Browne, at 14 under, had an 18-footer from the collar on No. 18 and drained the putt. He shot 6-under 65 and stands at 15-under 198.
5:41 p.m. - Peter Senior started the third round six under par. By the time his third round was over, he went even lower, at nine under.
"It wasn't until the 10th hole that I started playing well," said Senior, who shot 3-under 68. "It all comes down to putting with the way the course is playing."
5:35 p.m. - Applying pressure on Olin Browne, Mark O'Meara drained a 15-foot birdie to close with one stroke of the leader. However, Browne retained the two-stroke lead as he guided in a 7-foot birdie of his own on the 17th hole. Browne jumped to 14 under par. After he made the putt, O'Meara gave Browne a playful little jab.
5:17 p.m. - Mark Calcavecchia knocked in a mid-range putt on the par-3 15th hole to reach double digits under par. He stands three strokes behind Olin Browne.
5:07 p.m. - Mark O'Meara, playing in Olin Browne's group, cut into his lead with an 8-foot birdie putt on the par-3 15th hole. O'Meara watched as the putt broke 2 feet left before disappearing into the hole to get to 11 under par. The scoreboard looks like this:
Browne -13
O'Meara -11
Sluman -9
Calcavecchia -9
Senior -9
Sindelar -9
4:57 p.m. - Jeff Sluman came into the day at three under par. By the time he was finished, he was nine under for the championship.Sluman's best finish in three previous Senior Opens was T16. "There were 18 pars to be had and I wanted to make at least one birdie," said Sluman, who had eight birdies Saturday. "I got myself, at least, somewhere in contention."
4:48 p.m. - Olin Browne birdied the 12th and 13th holes to fall to 13 under. He's three strokes up on Mark O'Meara.
4:05 p.m. - With 2 feet to the hole, Olin Browne tapped in for birdie to take the solo lead at the Senior Open. Her's 11 under par, followed by Mark O'Meara at 10 under and Mark Calcavecchia at nine under.
3:54 p.m. - Moments after Olin Browne bogeyed the par-4 10th hole, Mark O'Meara nailed a 6-foot birdie putt on the same hole to tie Browne at 10 under.
3:40 p.m. - Leader Olin Browne created a little space between him and the rest of the field when he birdied the par-5 eighth hole. He stands at 11 under.
3:35 p.m. - Jeff Roth birdied the 10th, 11th and 12th holes to get into contention. He knocked in a 6-footer on No. 12 to reach nine under par.
3:31 p.m. - Mark Calcavecchia reached the par-5 eighth hole in two shots, setting up an eagle attempt from 3 feet away from the hole. He converted the putt to get to eight under par. The scoreboard looks like this:
Olin Brown -10
Jeff Sluman -9
Jeff Roth -8
Corey Pavin -8
Mark O'Meara -8
Calcavecchia -8
3:26 p.m. - Corey Pavin couldn't save par on the par-4 ninth hole, dropping back to eight under. Olin Browne still leads at 10 under, followed by Jeff Sluman at nine under.
3:20 p.m. - Jeff Sluman continued to impress, this time knocking in a winding 40-footer on the par-3 12th hole to go to nine under.
3:10 p.m. - Jeff Sluman rolled in a 4-foot birdie putt to get to eight under through 11 holes. Moments after that, Corey Pavin knocked in an 8-foot putt for birdie on the par-4 11th hole to pull within one stroke of leader Olin Browne, who was holding steady at 10 under par.
3:01 p.m. - We've seen plenty of moving on moving day. Now it's Michael Allen's turn. He birdied the par-4 sixth hole to get to eight under par. Jeff Sluman, who had been eight under, bogeyed No. 9 and is currently seven under.
2:52 p.m. - Corey Pavin, with a birdie on the par-4 seventh, moved into a tie for second at eight under par. He's tied with Mark O'Meara, who dropped back a stroke with a bogey on the fifth hole.
2:48 p.m. - Jeff Sluman registered a 4-under 33 on his outward nine to stand seven under par. Hal Sutton fell off the leaderboard after dropping to four under.Mark Calcavecchia also gave back a stroke on No. 5. He's six under par.
2:36 p.m. - Second-round leader Olin Browne birdied the par-5 fourth hole and stands at 10 under par, the first player to reach double digits under par. On the same hole, Mark O'Meara carded a birdie to fall to nine under.
2:32 p.m. - Mark Calcavecchia and Jeff Sluman pulled even with Mark O'Meara at eight under par. Sluman birdied the par-5 eighth hole; Calcavecchia the par-5 fourth.
2:18 p.m. - John Huston and Jeff Sluman birdied the seventh and sixth holes, respectively, to drop to seven under.Six players were tied at seven under. One of those who was not was Hal Sutton, who bogeyed the par-4 13th for his first bogey of an otherwise stellar round. He had six birdies through 11 holes.
2:08 p.m. - There were 39 sub-par scores in the second round, which is a U.S. Senior Open record for most sub-par scores in the second round. The 39 sub-par scores in the second round broke the record of 35 set at Crooked Stick Golf Club in Carmel, Ind., in 2009.
Tim Jackson of Germantown, Tenn., was the only amateur in the field to make the cut, finishing at 2-over-par 144 through 36 holes. Jackson is the low amateur in the Senior Open for the third straight year, tying for the most times as low amateur with Marvin "Vinny" Giles (1993, 1996, 1997)
2:01 p.m. - Olin Browne and Mark O'Meara started their rounds with pars. Browne was still nine under and O'Meara was holding at eight under. Four players - Mark Calcavecchia, Peter Senior, Joey Sindelar and Hal Sutton - were two strokes behind Browne, at seven under.
1:52 p.m. - With his sixth birdie of the round, Hal Sutton was six under through 11 holes.
1:33 p.m. - Hal Sutton continued his torrid play, birdieing No. 10. He's recorded three birdies in a row. Jeff Sluman also has gone on a birdie-fest, carding three consecutive on Nos. 2, 3 and 4, to get to six under. John Huston birdied the par-5 fourth to also drop to six under.
1:25 p.m. - Steve Pate birdied the par-5 fourth hole and stands at six under par. Meanwhile, Hal Sutton turned in a 4-under 33 on the outward nine and has reached five under par.
1:15 p.m. - Steve Pate and John Huston both reached five under par. Pate birdied the par-3 third hole while Huston birdied the par-4 second hole.
10:57 a.m. - The second round of the U.S. Senior Open wrapped up at 8:08 a.m. today. The third round started at 9:29 a.m. Thirty groups of two will play from the first tee with a last starting time of 1:50 p.m.