Kevin Stadler and Robert Karlsson have taken control at the OHL Classic at Mayakoba after another weather-affected day in Mexico. Stadler produced a stunning bogey-free eight-under second round of 63, while Sweden&aposs Karlsson threw away the opportunity to lead the PGA Tour event outright with two late bogeys at El Camaleon. The second day in Playa del Carmen on the east coast of Mexico began at 7:45am local time, with 57 players yet to even begin their first round. With rain and lightning having wreaked havoc on the opening day&aposs play, Friday was also interrupted with the players forced from the course in the afternoon as another thunderstorm rolled in. Play did resume, however, and long enough for Stadler to complete his second round, before darkness saw officials call time with only 29 players having finished 36 holes. Stadler and Karlsson lead at 12 under, three shots clear of South Africa&aposs Rory Sabbatini, who is six under through 17 holes in his second round, and Chris Stroud (four under through 15). Ryan Moore and Venezuela&aposs Jhonattan Vegas are the next highest-placed players to have completed two rounds at eight under overall, tied for fifth with Pat Perez (three under through 14) and Jay McLuen (four under through 14). Brian Stuard, who had led the tournament after Thursday&aposs opening day, remains on six under overall, having yet to tee off for his second round. Stadler looked strong after three birdies on the front nine but went up a gear on the run home, picking up five more shots, including one each on the 17th and 18th holes to card the best second-round score so far. Karlsson had led the American for the majority of Friday&aposs play but the afternoon&aposs stoppage seemed to affect the Swede as he stumbled to bogeys on the 16th and 17th holes, before a birdie on the 18th ensured he finished level with Stadler.