JERICHO, New York (Ticker) -- Hale Irwin brings a one-stroke lead into Saturday's second round of the $1.7 million Lightpath Long Island Classic.

Irwin registered seven birdies over his final 12 holes and shot a 7-under-par 64 on Friday. The Senior Tour money leader, he played a bogey-free round and assumed the lead with an eight-foot birdie putt at the par-3 18th hole.

Irwin, who has two wins this season and 34 in eight years on golf's elder circuit, matched his low round of the year and is one-stroke ahead of Gil Morgan.

Two-time champion Bruce Fleisher and fan favorite Lee Trevino are among five golfers who carded 66s.

Afterward, Irwin credited his round to a change in his game.

"I made a slight change in my stance last week while I was in St. Louis," he said. "I opened up my stance a little bit and probably had one of my better ball-striking rounds in a while. Now I've got a stiff back, but thank God for the warm weather."

With temperatures soaring into the 90s, conditions were ideal and 10 players had bogey-free rounds. A total of 44 were under par.

One player who had an inconsistent round was defending champion Bobby Wadkins, who opened with an even-par 71.

Bob Gilder, who has won the last two events in playoffs, also shot a 71 and is tied for 45th, seven shots back.

Irwin started consistently, parring his first six holes. He started his run at the par-3 seventh, sinking a 12-foot birdie putt and followed with another birdie at No. 8.

After making the turn, Irwin used another consistent formula as he birdied every other hole. At the par-5 10th, he two-putted from 45 feet for birdie.

Irwin took the clubhouse lead at No. 18, hitting a 6-iron within eight feet of the cup before rolling in for another birdie.

Morgan also had a bogey-free round but took a different route than Irwin. Morgan had six birdies on the first 13 holes before parring the last five at the 6,840-yard Meadow Brook Club course.

No stranger to success here, Fleisher is in contention after a round that included six birdies and a bogey. Of his 10 rounds at this course, Fleisher has posted nine in the 60s and is a combined 45-under-par.

"I think certain courses look good to certain players, and I like this course," Fleisher said. "I had three really wonderful years here."