Power began with a par and a bogey on his first two holes but picked up four shots from there to head to the clubhouse, tied with American Patrick Rodgers on three under par.
Ireland’s Seamus Power carded a three under 69 to close out the opening round of The Genesis Invitational one shot behind leader Denny McCarthy.
World number one Scottie Scheffler split four birdies with two bogeys to sit tied for fourth on two under.
Starting on the back nine, he offset an early bogey with a birdie at the turn, but another bogey on the first threatened to derail his day.
The duo trail McCarthy by one at the top of the leaderboard after the American nabbed the outright lead with a clutch eagle on the par-five 18th.
