Co-leaders Jamie Lovemark and Jhonattan Vegas are one-stroke clear at the Zurich Classic of New Orleans after day two on Friday.
The field have been forced to play catch-up in New Orleans after wild weather and thunderstorms suspended play in the opening round on Thursday.
After an early start, Lovemark and Vegas were able to complete their second rounds on a gruelling day at TPC Louisiana, as the pair moved atop the leaderboard at 11 under.
American Lovemark was almost flawless, holing seven birdies and dropping just one shot for a six-under-par 66, after completing a first-round 67 earlier on Friday.
Vegas - the Colombian who played 31 holes on Friday - carded a second-round 69 for a share of the lead.
Overnight leader Brian Stuard - seeking his first PGA Tour title - was a shot behind and through 12 holes when play was suspended due to bad light.
After paring the back nine, Stuard made back-to-back birdies after the turn to be two under the card heading into the third round.
Harold Varner III (67) was in sole possession of fourth position at the end of the round, three strokes off the pace.
Patton Kizzire (70) and Thomas Aiken (69) were a shot further back, alongside Daniel Berger (through 13) and Patrick Rodgers (through seven), who were yet to complete their second rounds.
Australian world number one Jason Day was also among those yet to finish.
Day - five under heading into day three - managed 10 holes without dropping a shot.