RIDGEDALE, Mo. (AP) — Phil Mickelson closed with a 5-under 66 to reach 22 under, leaving him three shots clear of Tim Petrovic and giving him a wire-to-wire win in his debut on the PGA Tour Champions.

Mickelson became the 20th player to win on the 50-and-over tour in his first start.

He also earned some much-needed confidence after a missed cut at The Northern Trust knocked him from the FedEx Cup Playoffs.

Mickelson is trying to fine-tune his game for the U.S. Open at Winged Foot.