Patrick Rodgers shot a 7-under 63 after barely making the cut to move within two shots of the lead at the Travelers Championship.
The 22-year-old former Stanford star made his PGA Tour debut at this tournament a year ago.
He played in the day's first group Saturday and is at 9 under with a round to go. He shot a bogey-free round. Five of his seven birdies came on the back nine, including two straight to finish.
Rogers is chasing Bubba Watson, who finished the second round at 11 under and was to tee off later in the day.
With a storm heading to Connecticut, officials have decided that Sunday's final round will be played in threesomes, going off the first and 10th tees beginning at 11:30 a.m. EDT.