Kuchar was four shots behind Luke Donald at the start but made that up with seven birdies on his first 10 holes. He had a birdie putt of less than eight feet at the par-3 17th, but three-putted for bogey to fall into a tie for first.
Kuchar was in more trouble in a bunker at Harbour Town Golf Links' closing lighthouse hole. That's when he blasted out and watched the ball rattle in for birdie. Kuchar punched the air and raised his arms in celebration of his seventh career PGA Tour win.
