Jonas Blixt and Brendon de Jonge share the leaderboard at 14-under after the second round of the Justin Timberlake Shriners Hospitals for Children Open.
Blixt finished the first two rounds at 14-under 128, with De Jonge following his opening 62 with a 66 on Friday to match the Swede.
The 28-year-old birdied numbers 15 and 16, made a double bogey on the par-three 17th, and finished with a birdie on 18.
Ryan Moore, who led after the first round on Thursday, was a stroke back after a 68.
Tim Herron (68) and Daniel Summerhays (63) share the fourth spot at 11-under-par 131.