Kuchar collected his fourth career PGA Tour title thanks to steady play down the stretch as Laird drained five birdies in a seven-hole span from the seventh to grab a share of the lead.
But Laird couldn't match Kuchar's cool at the end, closing with a bogey to post a 5-under 67 and end at 11-under 277 -- two strokes behind the winner.
Kevin Na, who led after three rounds, slid to a 4-over 76 and ended with a share of seventh place at 8-under 280.
Luke Donald won't be able to reclaim his world No. 1 ranking after finishing in sixth place at minus-9 following Sunday's round of 6-under 66.