Scott Parel, looking to shake off the disappointment of a seven-hole playoff loss last month, leads the KitchenAid Senior PGA Championship by one stroke after the opening round Thursday in Rochester, N.Y.

Parel opened with a 4-under-par 66 at Oak Hill Country Club, giving him a one-shot edge on Ken Tanigawa, Marco Dawson and South Africa's Retief Goosen.

Jeff Maggert, Sweden's Jesper Parnevik and Northern Ireland's Darren Clarke share fifth place at 2 under. Eight players are tied for eighth at 1 under.

Parel, 54, engaged in a memorable, two-day playoff with Kevin Sutherland at the Rapiscan Systems Classic in Biloxi, Miss. They contested five playoff holes on March 31 before returning to the course April 1. Both parred the sixth extra hole before Sutherland's birdie on the seventh playoff hole proved decisive.

Although he appeared in just five PGA Tour events in his career, Parel has found success on the PGA Tour Champions circuit, winning the Boeing Classic and the Invesco QQQ Championship last year.

On Thursday, his round included an eagle on the par-5 fourth hole, one bogey (at the par-4 seventh hole) and three birdies, at Nos. 13, 17 and 18.

Tanigawa was at 5 under for the round before he carded back-to-back bogeys at Nos. 14 and 15, then parred the last three holes.

Dawson's bogey-free day included three birdies, all on the front nine.

Goosen's round featured four birdies and one bogey.

Defending champion Paul Broadhurst of England, who won at Benton Harbor, Mich., last year, is tied for 16th at even par.

Rocco Mediate, the 2016 champion, shares 28th place after a round of 1 over par. Germany's Bernhard Langer, the 2017 winner, is tied for 42nd at 2 over par. Scotland's Colin Montgomerie, who captured the event in 2014 and 2015, shot 4 over to land in a tie for 70th among 156 players.