Long-hitting American Gary Woodland charged into a one-shot lead after the second round of the OHL Classic at Mayakoba in Mexico, with Waterford man Seamus Power five shots off the pace.
Woodland, showing improved form with his putter in near-perfect scoring conditions at El Camaleon Golf Club in the resort of Playa del Carmen, fired a flawless six-under-par 65 to post a 13-under total of 129.
Former U.S. Open champion Webb Simpson was alone in second after firing a matching 65, with fellow American Scott Piercy a further stroke adrift at 11-under after carding a 66.
Woodland, who won the most recent of his two PGA Tour titles at the 2013 Reno-Tahoe Open, birdied three of his last four holes to set the pace after 36 holes.
Power lies on eight under after a 66, with birdies coming at first, second, fifth, sixth and seventh. The back nine was a more mixed affair with two more birdies and bogeys at the 12th and 15th to leave him tied in 11th position overnight.
American Chris Kirk, the first-round leader after opening with a sizzling 63, returned a 70 on Friday to sit four shots off the pace in a seven-way tie for fourth.
Defending champion Graeme McDowell of Northern Ireland was a further seven strokes back on two under, having rebounded from an erratic 75 on Thursday to shoot a 65 and make the cut right on the number.
