Lucas Glover, who was part of a four-way tie at the top after the opening round, shot a 6-under 64 in wet conditions Friday to take a two-stroke lead into the weekend of the ISCO Championship.
The PGA TOUR event at Hurstbourne Country Club counts on both the FedEx Cup and the Race to Dubai, with 50 DP World Tour members teeing it up at Hurstbourne Country Club in Kentucky.
Glover, who won his sole Major to date in 2009, carded a second bogey-free round in a row, making three birdies on each nine to get to 13-under-par for the tournament.
Fellow American Steven Fisk, who held a share of the first round lead, was joined by compatriot Chan Kim at 11-under-par.
DP World Tour player Jeong Weon Ko has struggled this season until two top 30s the past two weeks, but is finding form in Louisville and sits three shots back at ten-under alongside American Aaron Wise.
William Mouw sits a shot further back, with Stephen Jaeger and Davis Chatfield one behind him.
Romain Langasque, who was tied 11th in Italy before a tied 16th finish last week in Germany, is part of large chasing pack that rounds out the top ten.
