Daniel Summerhays birdied the final hole on Friday for a 6-under 65 and a share of the second-round lead with Will Claxton and Greg Owen in the wind-swept Mayakoba Golf Classic.
Claxton, the first-round leader, shot a 68, and Owen had his second straight 67 to match Summerhays at 8-under 134 on the El Camaleon course.
Chris Stroud was a stroke back after a 66, and Robert Allenby (67), Kevin Stadler (68) and Richard S. Johnson (66) followed at 6 under.
Summerhays had seven birdies and a bogey. The 28-year-old made only eight cuts in 29 PGA Tour starts last season.
"I drove the ball perfectly, pretty much," Summerhays said. "I hit it really solid into the wind. It's a tough driving golf course."
He holed a 35-foot birdie putt on the par-4 second hole and hit to an inch on the par-3 third to set up another birdie.
"It kind of just set me at ease there," Summerhays said. "I'm looking forward to learning and just seeing how my emotions react. And that's the only way to become a champion, so I'm excited for the weekend."
30-year-old Claxton, making his fifth career start on the PGA Tour, had four birdies and one bogey.
"The wind was a little gustier today, but I've just kind of had good control over my ball," Claxton said. "I certainly had a couple of good breaks here and there and putted the ball well. I'm just doing all the things you do when you're playing well."
Owen had five birdies and one bogey. The 40-year-old Englishman won the European Tour's 2003 British Masters.
"I played really well today," Owen said. "Tough conditions and drove it in most of the fairways and just kept plugging away and took some chances.
"It's been a bit of wandering around in the wilderness for a couple of years, so it's nice to see play is back and it's nice to see a few putts drop in."
Defending champion Johnson Wagner was 1 over after a 70. He won the Sony Open in Hawaii in January and tied for second the following week in the Humana Challenge.
Last year, Wagner beat Spencer Levin with a par on the first hole of a playoff.
Levin was 2 over after a 71.
Greg Norman missed the cut with rounds of 79 and 73. The 57-year-old Norman designed the seaside course. He played in a group with Wagner and Levin.
Mike Weir also missed the cut, following an opening 79 with a 78.
Coming off surgery on his right elbow in August, the Canadian missed the cut two weeks ago in the AT&T Pebble Beach National Pro-Am and failed to secure a sponsor exemption last week for the Northern Trust Open at Riviera.