Billy Horschel posted his second straight under 66 on Friday to take the lead at the midpoint of the Colombia Championship.
Horschel, a first-round co-leader, finished 36 holes at 10-under 132 and is two strokes clear at the Country Club de Bogota.
Brian Smock, who also shared the first-round lead, shot a three-under 68 and is second at minus-eight.
Erik Flores (68) and Michael Sim (65) are knotted in third at seven-under 135.
The final first-round leader, Peter Lonard, only managed a one-under 70 on Friday and shares fifth with Andrew Svoboda, who fired a five-under 66 in round two. The pair is tied at six-under 136.
Horschel, who missed a two-footer for par on his last hole Thursday, erased any nerves from that bogey. He birdied three of his first four holes on Friday and reached eight-under par for the championship.
Horschel's lone bogey of the round came at the same hole as the careless error on Thursday. He bogeyed the ninth, but atoned for the error quickly on Friday with a birdie at No. 10.
"I was really trying to get through without a bogey today," admitted Horschel. "Overall, it was a good day."
Horschel birdied the 13th to get to nine-under, then closed his round much better on Friday than Thursday's hiccup. He poured in a 12-footer for birdie to best the tournament's 36-hole record by a stroke.
"You want to play well after a round like yesterday, but it's always tough because sometimes the putts don't go in," said Horschel. "Not that I had a really low round but sometimes it's difficult to follow up a decent round with another decent one. I made a couple of early birdies but then a few putts just slipped out, and that's going to happen."
Skip Kendall (67), Ryan Hietala (68), Tom Hoge (66) and Hudson Swafford (69) share seventh at five-under 137.
NOTES: Horschel is winless on the Nationwide Tour...The first round was completed Friday after darkness stopped play on Thursday...The 36-hole cut fell at one-over 143 and defending champion Brenden Pappas, who won last year when the event was trimmed to two rounds, made the cut on the number.