San Mateo's Michael Allen shot a 7-under 63 on Friday and broke away from the pack for a five-stroke lead after the second round of the U.S. Senior Open.
Allen was among seven players who shared the first-round lead at 3 under. He birdied five of the first eight holes and eagled the par-5 14th at Omaha (Neb.) Country Club. Allen's 36-hole lead is the largest in the event's 34-year history.
"Man, oh, man. The biggest lead?" Allen said with a smile. "So I can blow the biggest lead. Is that what you're telling me?"
Rocco Mediate, at 5 under after a 67, was his closest pursuer.
Allen, 54, never won in 394 starts on the PGA Tour but has four victories since joining the Champions Tour four years ago, including the 2009 Senior PGA Championship.
Allen hit his second shot onto the bottom shelf of the two-tiered 14th green. On his 50-foot uphill eagle putt, the ball hit the back of the cup, popped up and fell in.
"The miracle shot," Allen called it.
He said he wanted to lag the ball to within 10 feet.
"It wasn't about me," Allen said. "Obviously, something else happened. What do you say? The Lord did it or whatever."
PGA Tour: Defending champion Zach Johnson shot a 5-under 66 to join rookie Patrick Reed and Lucas Glover atop the John Deere Classic leader board at 12-under 130 in Silvis, Ill.
Reed shot a 63, just one year after missing the cut at TPC Deere Run -- and Glover had a 62. Reed's wife, Justine, is on the bag as his caddie.
Matt Jones (65) was a shot back. Chez Reavie had the day's low round -- a 61 -- for a 133.
Stanford amateur Patrick Rodgers (69) was at 136, while former Alameda resident Matt Bettencourt, a late alternate, struggled to a 73 for a 138.
European Tour: Phil Mickelson and Ernie Els endured frustrating second rounds at the Scottish Open in Inverness.
Chris Doak, ranked No. 341, was the surprise leader after a second straight 66 left him at 12-under 132 at Castle Stuart. Matthew Southgate (64), Ross Fisher (65), Peter Uihlein (66) and JB Hansen (65) were at 133.
Mickelson was tied for third after a first-round 66 but fell back into a tie for 13th after a 70. Els (70) had a 142 total and missed the cut a week before he defends his British Open title.
"I'm glad I'm leaving," said Els, who still feels his game is in good shape heading to Muirfield.
LPGA Tour: Catriona Matthew shot a 7-under 64 to take a three-stroke lead at the Manulife Financial Classic in Waterloo, Ontario.
Matthew's 15-under 127 blew away her previous career-best 36-hole tour mark by five shots. Angela Stanford (67) was second. Inbee Park (67), looking to win her fourth straight tour event, was at 10 under, tied for eighth at Grey Silo.
Christina Kim (65) and Michelle Wie (67) were 6 under, two shots ahead of Paula Creamer (66).
Web.com Tour: Chad Collins missed a chance for the fourth 59 in tour history, parring the final six holes for an 11-under 60 at the Utah Championship in Sandy.
He missed a 15-foot birdie putt on the par-4 ninth, his last hole of the day at Willow Creek. He had an eagle and nine birdies on the first 12 holes. Collins was at 16-under 126, three shots ahead of Jamie Lovemark (62). Adam Hadwin (65) and Brian Prouty (66).