Tom Kite set a U.S. Senior Open record with a 28 on the front nine at Indianwood and finished a 5-under 65 on Thursday in Lake Orion, Mich.
Corey Pavin's sixth birdie on his 17th hole pulled him into a tie atop the leader board, but a penalty pushed him back to the pack after completing his first round.
Pavin hit a chip after his ball moved back a fraction of an inch when he grounded his club on his 14th hole, and that later cost him two strokes.
"Yeah, I agree," he said after watching slow-motion replays of the infraction with officials in a TV trailer.
That setback put Bernhard Langer and Lance Ten Broeck in second place, one shot behind Kite. It pushed Pavin into a five-way tie for fourth with Fred Funk, Jeff Sluman, Tom Pernice Jr. and Mikael Hogberg at 3-under 67.
"Still a very good score," Pavin said. "I just like the way I played."
Kite, who matched the lowest nine-hole score of his career on the front nine, is confident his window to win on the Champions Tour hasn't closed.
The 62-year-old Kite expects players like him to have success more than a decade into their career on the 50-and-over circuit because they're staying in shape and relentlessly working on their game.
"You probably haven't read, but 60 is the new 40," Kite said.
Kite, whose season-best finish was a tie for second four months ago at the Toshiba Classic, hasn't won on the Champions Tour since 2008.
He put himself
"The gallery let me know it went in the hole," Kite said.
Kite also had five birdies before making the turn, leaving his playing partners -- Peter Jacobsen and Scott Simpson -- to marvel at his 7-under front nine.
"I felt like the Washington Generals playing against the Harlem Globetrotters out there," Jacobsen said. "He didn't miss a shot on the front nine."
Pleasant Hill's Dale Bouguennec shot a 75, and fellow amateur Bob Fulton of Martinez shot a 78.
PGA Tour: Troy Matteson scored 10 birdies en route to a bogey-free round of 10-under 61 for a three-stroke lead after one round of the John Deere Classic in Silvis, Ill.
Matteson, a two-time winner on the PGA Tour, birdied five holes on each nine of the TPC Deere Run to surpass the 7-under 64 of second place Ricky Barnes. Matteson started by making birdies on three of his first four holes and finished with birdies on four of his first five.
Robert Garrigus, among a group tied for third at 6-under 65, eagled the par-5 17th by hooking a 270-yard second shot around a tree to set up a 30-foot eagle putt.
Steve Stricker, chasing a fourth straight victory in the Deere, shot a 65 punctuated by an 80-yard wedge for an eagle 2 on the par-4 14th.
Amateur Patrick Rodgers, who just completed his freshman year at Stanford, shot a 67.
European Tour: Francesco Molinari tied the best round in the Scottish Open's 40-year history, shooting a 10-under 62 to take a two-shot lead into the second day of the British Open warm-up tournament in Inverness.
The Italian rolled in 10 birdies in his first 15 holes in calm early conditions on the Castle Stuart links course but missed out a chance to shoot the first 59 on the European Tour by finishing with three straight pars.
"I know it's not going to last for much longer," he said. "I'll just try to enjoy the moment."
Top-ranked Luke Donald looked set to finish close behind Molinari until he bogeyed two of his last five holes for a 67. Alejandro Canizares of Spain was second after a 64.
Phil Mickelson had a 73 on a day he was supposed to be at the Vatican with his wife and daughter. He cut short his vacation to get more practice ahead of the British Open.