Irishman Padraig Harrington posted a three-under 69 to take a one-shot lead after the opening round of the PGA Grand Slam of Golf which features the season's four major winners.
Harrington, who earned his spot by winning the British Open title, is one stroke in front of Argentina's Angel Cabrera, who captured the US Open.
"I managed to hole the right putts at the right time," Harrington said. "So obviously I'm pleased where I am."
"However, I feel like I need to play a little better tee-to-green tomorrow because, you know, you can't rely on holing all of the putts that I did today," he said.
Americans Zach Johnson, winner of the Masters, and Jim Furyk share third place, four shots back of Harrington at the 36-hole event at the Mid Ocean Club.
Furyk says his entry is an early Christmas present from PGA Championship winner Tiger Woods, who pulled out so he could spend time with his wife and young daughter.
After bogeys at 13 and 14, Harrington came through with a birdie at the par-three 16th to hold onto the lead.
"I was struggling with my game so my head was very much down on working today," Harrington added.
Harrington, along with Cabrera and Johnson, are first-time participants at this event, which moved to Bermuda after 13 years in Hawaii.
Cabrera, with a two-under 68, had four birdies and nearly caught Harrington on No. 18 before his 15-foot eagle putt stopped short.
"I haven't played this course much," Cabrera said. "Today I used the driver and drove the ball absolutely perfectly."
"I think it's a good exhibition tournament and we're able to show what we can do with a golf ball," he said.
The 38-year-old Cabrera's lone win in 90 PGA events came at the Oakmont Country Club on June 17.