On another day of low scoring along the Mexican coast, Michael Putnam moved to the top of the standings as he looks to secure his first PGA Tour win. Here's how things stand after the second round of the OHL Classic at Mayakoba, where Putnam holds a one-shot lead:
What it means: Putnam was able to break free from a sizeable logjam with a 7-under 64. After winning Web.com Tour Player of the Year honors in 2013, Putnam is now embarking on his second season on the main stage and holds a slim lead over Bohn, a runner-up last week in Mississippi, and Stefani, who lost a playoff earlier this year at the Quicken Loans National.
Round of the day: Duke hasn't done much celebrating since notching his maiden win at the 2013 Travelers Championship, but an 8-under 63 in the second round serves as his new career low. The veteran made the turn in 4 under and then finished his round in style, making birdies on four of his final six holes to card the low round of the week.
Best of the rest: Putnam was one shot off the pace entering the second round but quickly pulled ahead with five birdies on his first eight holes. He made it around El Camaleon without dropping a shot after finding 15 of 18 greens in regulation, and now has made just one bogey through the first 36 holes.
Biggest disappointment: Pat Perez was firmly in contention after an opening 66, but he tumbled down the standings Friday with a 2-over 73. He made two double bogeys in a three-hole span from Nos. 14-16, and despite a run of four birdies from Nos. 2-6 he went from one shot off the pace to nine shots behind Putnam.
Main storyline heading into Saturday: Putnam still has to fight for golfing superiority among his own family - his brother, Andrew, is a rookie this season on the PGA Tour - but a win this week would go a long way toward settling any sibling rivalry. The top name among the chase pack might be Bohn, who has carried the momentum from last week's near-miss and will look to win for the first time since 2010 on a course where he finished T-3 last year.