David Toms and Chez Reavie share the first-round lead after the American pair both enjoyed rounds of eight-under-par 62 at the Crowne Plaza Invitational at Colonial.
Toms, fresh from his play-off defeat to KJ Choi at the Players' Championship in Sawgrass on Sunday, and Reavie, who is returning from surgery, both played flawless bogey-free rounds, including eight birdies.
Rickie Fowler is one shot back at 63 after shooting a second-nine 29 that included one eagle and six birdies before a double bogey on his last hole.
Toms said: "It was one of those days where the hole just looked big. "This round certainly helps me get past what happened last week at the end. "I needed to get off to a good start."
Reavie bettered his career-best score by two strokes while it was Toms' best score in 429 rounds since a career-best 61 at the Sony Open in Hawaii in January 2006, the last of his 12 PGA Tour victories.
Reavie is returning after reconstructive surgery on his right knee last year.
He said: "It's just great to be out there.
"It feels great. It swells up some, but it's not from the golf. It's from the walking. I wake up the next day and feel great. It's much better than it was."
Fowler missed the chance to tie the tournament record after his double-bogey at the final hole.
"It's a sorry way to finish the round, but I hit it really well, putted well," Fowler said.
"A 29 with a double (bogey) is not too bad.
"I'm excited to be playing well this week and kind of draw off the good out there today. A 63 to start off with is pretty awesome."
Five players are tied at 64 - Brendon de Jonge, Stewart Cink, Brian Gay, Nathan Green and Charlie Wi.
Henrik Stenson and Sergio Garcia are the leading Europeans in a nine-way tie for 12th after rounds of four-under 66.
Martin Laird and Brian Davis are the top-placed Britons, the former tied for 39th seven shots adrift, one ahead of the Englishman who is in a share for 59th.