9:12 p.m. - Play was suspended due to darkness at 8:56 p.m. Play will resume Saturday morning at 7:15.
9:08 p.m. - Mark O'Meara entered the clubhouse carding a 3-under 68 and 8-under 134. "I'm pleased with the way I played," he said.
8:30 p.m. - Mark O'Meara birdied No. 8, a par-5 hole that measures 566 yards. He fell to eight under and was tied with Michael Allen for second place.
8:09 p.m. - A bogey on the par-4 16th hole dropped Michael Allen back a stroke. He currently trails leader Olin Browne by one shot. Players are going to play up until dark. There's about another hour of light left.
8 p.m. - In the second round, David Frost, was disqualified from the U.S. Senior Open for failing to record a score on the ninth hole, his final hole of the day. Frost hit his tee shot out of bounds on the hole, but was not aware it came to rest out of bounds until he got to the area. At that point, he chose not to return to the tee and finish the hole, resulting in his disqualification. He was five over par at the time of the infraction.
7:35 p.m. - Michael Allen, in his second U.S. Senior Open, birdied the par-4 14th hole to equal second-round leader Olin Browne at nine under. Browne was in the clubhouse after shooting 2-under 69 on Friday. Allen won the 2009 Senior PGA Championship.
Before turning to golf as a profession, he was planning to become a stockbroker. So far this year on the Champions Tour, he's had six top-10 finishes.
7:11 p.m. - Mark O'Meara, the 1979 U.S. Amateur champion, birdied three of his last four holes to get to eight under par.
As an aside, D.A. Weibring carded an ace on the 170-yard par-3 third hole with a 6-iron. It is the 18th known hole-in-one at the U.S. Senior Open. The last ace was recorded by Bob Ford on the third hole in the second round at Whistling Straits in Kohler, Wis., in 2007.
6:51 p.m. - Michael Allen continued to go lower as he birdied the par-4 second hole to get to eight under. He stands one stroke behind leader Olin Browne.
5:38 p.m. - Michael Allen birdied the par-4 sixth hole to get to seven under par. He trails Olin Browne by two strokes.
5:08 p.m. - Michael Allen, who had an afternoon tee time, birdied the fourth hole to fall to six under par. Damon Green, who caddies for Zach Johnson the PGA Tour, reached five under par through seven holes.
4:48 p.m. - Mark Calcavecchia followed a 3-under 68 first round with a 4-under 67 on Friday. Being in contention has him motivated. "It kind of goes along with confidence," he said of his two sub-par rounds. Olin Browne, who led after the first round, reached the midway point of the championship at nine under.
4:19 p.m. - Olin Browne got into the clubhouse on a high note after birdieing the par-4 18th hole. After two rounds, he's nine under par.
"It's a fun place to play," said Brown, who shot 2-under 69 Friday. "The course is playing totally different. It's playing long and soft."
4:03 p.m. - Olin Browne retook the lead with a 4-foot birdie putt on the par-4 17th hole. He and Kiyoshi Murota flip-flopped places on the scoreboard. In the meantime, Peter Senior got in the clubhouse with a 4-under 67 that put him six under for the championship.
Said Senior: "You know there are half a dozen birdie chances on the front, so there are still a few long par‑4s on that front side. If you can negate those and navigate those and make the best on the par‑5s, you should be able to pull in a good score."
3:46 p.m. - Kiyoshi Murota couldn't get up and down on the eighth hole, which resulted in a bogey. It moved him into a tie with Olin Browne, both of whom were two under.
3:26 p.m. - Kiyoshi Murota drained a 4-foot birdie putt on the par-4 seventh hole to take the outright lead. Olin Browne two-putted from 8 feet on the par-3 15th hole for par. He remains one stroke behind.
3:13 p.m. - Olin Browne suffered a three-putt on the par-414th hole and stands seven under par. The mishap allowed Kiyoshi Murota to catch him. Mark Calcavecchia, Trevor Dodds and Peter Senior were one shot off the pace.
2:21 p.m. - Mark Calcavecchia, the 1989 British Open champion, birdied the par-4 first hole and fell to six under for the championship. In his only Senior Open appearance, in 2010, Calcavecchia finished in a tie for 24th. While Calcavecchia was busy moving up the leaderboard, Kiyoshi Murota kept up his torrid pace, birdieing the par-3 third hole. Murota has split his time between the Japan Senior Tour and the Champions Tour.
Peter Senior, who tied for sixth in last year's U.S. Senior Open, birdied the par-5 fourth hole to get to five under par.
2:12 - Corey Pavin and Mark Calcavecchia started their inward nine at five under par. Pavin had played 10 holes; Calcavecchia nine. So the way it lines up is Olin Browne leads at eight under followed by Kiyoshi Murota and Trevor Dodds at six under, with Calcavecchia and Pavin at five under.
2:01 p.m. - Kiyoshi Murota dropped to six under par with consecutive birdies on Nos. 17, 18 and 1. He started his round on No. 10. He's two strokes behind Olin Browne. Trevor Dodds, with a birdie on No. 7, was also six under. Meanwhile, Peter Senior birdied the par-4 first hole to post a 4-under score.
1:41 p.m. - Olin Browne briefly got to nine under par. That was after six holes. He quickly double bogeyed the par-4 seventh before birdieing the par-5 eighth hole. He currently stands two strokes ahead of Trevor Dodds and three ahead of Kiyoshi Murota, who was five under.
12:49 p.m. - Corey Pavin, a past U.S. Open champion, is starting to make his way up the leaderboard. He birdied the par-4 14th to get to four under par.
12:44 p.m. - Trevor Dodds crept closer to the lead with a birdie putt on the par-5 fourth hole. He's currently at seven under par. After registering a birdie on the second hole, Olin Browne has remained consistent, firing off three straight pars to remain at eight under.
12:33 p.m. - Plenty of red numbers on the course today. Four players are at three under, and one at two under.
Here are a couple of notes about the course: the course received approximately a half inch of rain this morning during the early morning thunderstorms that rolled through the Toledo area. This negatively impacts the firmness.
Green Speeds are approximately 11-feet 3-inches on the Stimpmeter. All greens were single cut and rolled this morning after a single cut and roll Thursday evening.
12:23 p.m. - Trevor Doods birdied the par-3 third hole to trail Olin Browne by two strokes. Dodds stands at six under par.
12:19 p.m. - After birdieing the second hole Friday, Trevor Dodds of Southwest Africa fell to five under par. In his only other U.S. Senior Open appearance, he failed to make the cut. In the 2011 Senior PGA Championship he finished 11th.
11:58 a.m. - Leader Olin Browne carded a birdie on the second hole, getting to eight under. Meanwhile, Mark Wiebe fell off a stroke when he bogeyed No. 13. Two-time U.S. Senior Open champion Hale Irwin got on the leaderboard after birdieing No.3 He was five shots behind Browne. On Thursday, Browne was adamant that there was no reason to celebrate just yet. There's still a lot of golf to be played.
11:32 a.m. - Jim Thorpe birdied the par-3 third hole falling to four under par. Mark Wiebe moved within two strokes of leader Olin Browne with a birdie on the par-4 11th hole.
11:19 a.m. - Jim Thorpe and Mark Weibe parred their first holes Friday. Thorpe started on the first hole and Wiebe on No. 10. Thorpe remained three under; Wiebe four under. They trail clubhouse leader Olin Browne, who shot 7-under 64 on Thursday.
10:44 a.m. - Greetings, we'll be updating here as action dictates. Although we experienced a weather delay in excess of two hours, all players are expected to get started today.