EDMOND, Okla. — Colin Montgomerie shot an even-par 71 on Friday on the second day of the U.S. Senior Open and leads Scott Dunlap by one stroke.

Montgomerie opened with a 65 on Thursday. Dunlap had a 69 in the first round and a 68 in the second to get to 5 under for the tournament.

Dunlap was at 2 under after starting on the back nine, and then went back to the front nine and birdied Nos. 2, 5 and 7 on his way to a 32.

“I have been particularly good with the putter this week,” he said. “Been tidy. I have made a couple, made all my short ones. You know, those will be big in any tournament, for sure, but especially a major.”

Bernhard Langer, who leads the Champions Tour with three wins this season, moved into a tie for the lead with a 3-under 32 on the front nine, and then grabbed the advantage with a birdie on 14. He had bogeys on 15 and 16, both on close misses, and then bogeyed 18 to finish at 4 under.

Langer is tied with Gene Sauers for the tournament. Sauers shot 69 on both the first two days.

Marco Dawson shot a 66 on the opening day, good for second place, but shot a 76 on Friday and fell to even.

Lance Ten Broeck took advantage of an early tee time and fired a 69 to go to 3 under for the tournament. Jeff Sluman shot a 69 on Friday, including an eagle on the par-5 seventh hole, and is at 2 under. Vijay Singh was at 5 under before shooting a 39 on the back nine to fall to 2 under.

Scott Verplank struggled on his home course and shot a 75 for the second straight day. He said he hasn’t played this course so poorly in 25 years.

PGA Tour

Johnson, McGirt on top at John Deere: In Silvis, Ill., Zach Johnson and William McGirt were at 12-under-par 130 and tied for the lead at the halfway point of the John Deere Classic.

They were a stroke ahead of Steven Bowditch, Johnson Wagner and Brian Harman.

Three-time Deere winner Steve Stricker shot a 65 Friday for a 133 total to vault into contention at the par-71 TPC Deere Run, and was tied for sixth with Rory Sabbatini, Ryan Moore and Todd Hamilton.

Johnson, the Deere winner in 2012, shot a 4-under 67 in the afternoon despite two bogeys in his last four holes. That dropped him into a tie with McGirt.

McGirt, 35, is looking for his first PGA Tour victory.

He added a 66 to his opening 64, but like Johnson, he finished with a bogey.

Jerry Kelly and Charles Howell III were among those at 8 under. Howell, who shot 68, aced the uphill 132-yard third hole.

Defending champion Jordan Spieth was five strokes back of the leaders through 36 holes thanks to a 64 for 7-under 135.

European PGA

McIlroy slumps; 3 share lead: In Aberdeen, Scotland, Rory McIlroy surrendered the lead at the Scottish Open with his latest second-round meltdown on Friday, leaving three players tied for first place on a day when brutal winds played havoc with the field.

Kristoffer Broberg of Sweden, Argentina’s Ricardo Gonzalez and Marc Warren of Scotland were atop the leaderboard at 6 under, with just 17 of 150 players shooting below 70 on the par-71 Royal Aberdeen links course.

McIlroy shot a course-record 64 in the first round but followed it up with a 78, continuing a worrying trend this season that has seen the former world No. 1 fail to build on strong starts.

Justin Rose shrugged off the effects of hayfever to sign for a 68 and was alone in fourth place, a shot behind the trio of leaders.

Defending champion Phil Mickelson was among the afternoon starters who had to deal with a punishing breeze, especially on the back nine. A 73, which left him at 1 under, was something of an achievement but left him “mentally drained” just a week before the defense of his British Open title.

“I’m a little concerned that it’s taking up a little bit more energy than I’d like ahead of next week,” Mickelson said.

Englishmen Lee Westwood (73 for 3 over) and Ian Poulter (74 for 5 over) missed the cut.

Women’s British Open

Martin IN FRONT BY THREE: In Southport, England, American Mo Martin had a plan to play Royal Birkdale. It has worked better than she imagined at the Ricoh Women’s British Open.

Martin took two putts from short of the green on the par-5 18th for her 10th birdie in two days. It gave her another 3-under 69 and a three-shot lead over Beatriz Recari of Spain and former U.S. Women’s Open champion So Yeon Ryu going into the weekend.

The weekend will not include Michelle Wie.

Coming off her first major in the U.S. Women’s Open at Pinehurst No. 2, the 24-year-old from Hawaii never got anything going shot 78.

to miss the cut by three shots.

Only nine players remained under par and wind has yet to get fierce.