Daniel Summerhays birdied the final hole 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...