Patrick Cantlay held off top-ranked Jon Rahm to win the US PGA Tour Championship Sunday and claim the $15 million FedEx Cup playoffs top prize.

Cantlay two-putted for birdie at the par-five 18th to cap a one-under-par 69 that gave him a 21-under-par total and a one-shot victory over Spain’s Rahm, who made the second birdie of his two-under 68 at the final hole to finish on 20-under.

While Cantlay had said throughout that he was trying to approach each round as usual and tune out the prospect of a monster payday, he admitted that it wasn’t just another week.

Cantlay came into the tournament staked to a two-shot lead under the staggered scoring system that awarded the 30 starters strokes based on their place in the playoff standings.