Harris English shares the lead with Kevin Streelman, Cameron Davis of Australia and Russell Henley through one round of the PGA's Northern Trust Open near Boston.
English birdied four straight holes on the back nine before signing off for a 7-under 64.
He is ranked 27th in the FedEx Cup after beginning the year without a full PGA Tour card.
Among those at 65 were Louis Oosthuizen, Charley Hoffman and Scott Piercy, all well outside the top 70 of those trying to qualify for next week's $9.5 million event.
Tiger Woods opened with a 68 that featured five birdies over his last 10 holes.
with files from Associated Press