Phil Mickelson carded 17 pars and one birdie in a closing 69 at the USPGA and said he was looking forward to redeeming an injury-troubled season.
Mickelson has been hampered by a wrist injury this season
Mickelson pronounced himself pain-free for the first time since hurting his left wrist practising for June's US Open at Oakmont.
"I wish this was just a couple of weeks later because I finally was able to start practising," he said.
"Hopefully I should be ready for the final four events of the year."
World number three Mickelson, 37, finished at six-over-par for the tournament after picking up his first birdie at the 17th hole after a string of 16 pars.
"I had a nice Faldo round going where he won the British at Muirfield with no birdies, no bogeys," Mickelson said in reference to the steady style of British six-times major winner Nick Faldo.
"I played very well, had a chance to get the round going. I think I missed only one green the first 13 holes and had a lot of birdie chances. Didn't make any, made one on 17."
The US PGA Tour season finishes with the FedExCup play-offs, a series of four big-money events culminating in the Tour Championship.
"Usually this time of the year after the PGA, I'm ready to pack it in," Mickelson said.
"But because I feel like I haven't been able to play and practice three months, my excitement level to get back out and compete is still very high right now."
Mickelson, who the USPGA in 2005 and the Masters in 2004 and 2006, clinched the Players' Championship in May before missing the cut in both the US Open and Open Championship.