Continuing their defence of the Zurich Classic of New Orleans, Rory McIlroy and Shane Lowry combined for a second round of 69 that leaves them still six shots off the lead at at TPC Louisiana.
After an opening 64, the duo were five shots worse off after Friday's foursomes and occupy a share of 16th spot on 11 under.
McIlroy, playing his first tournament since winning the US Masters, and Lowry eagled the par five second and were six under for their round before a late stumble, the defending champions bogeying three of the last six holes to drop six shots off the pace.
PGA tour rookies Isaiah Salinda and Kevin Velo, after a tournament-record 58 on Thursday, followed up with a 69 (17 under) and are a shot clear of Ben Griffin and Andrew Novak, with Danish identical twins Nicolai and Rasmus Holgaard a shot further back on 15 under.
Salinda and Velo dropped two shots before the turn, but three straight birdies to start the back nine thrust them back into contention.
The late birdie on 17 lifted them ahead of Novak – who lost in a play-off to Justin Thomas at the RBC Heritage last week – and Griffin, who birdied three of their last five holes in a best of the day 66.
The Hojgaard twins added a second round 70 to their opening 59 to finish the day in third, two strokes off the pace.
English duo David Skinns and Ben Taylor are on 13-under-par after a 67.
Saturday's third round will return to the better-ball fourball format before a closing round in alternate shot foursomes.
