American JJ Henry finally tasted success on the US Tour at the 178th attempt on Sunday - and with it jumped from 26th to sixth in the Ryder Cup standings.

The 31-year-old, ranked 116th in the world, won the Buick Championship by three shots from compatriots Hunter Mahan and Ryan Moore, US amateur champion two years ago.

Henry took advantage of the absence of the world's top 20, going clear of the field with a third-round 63 and finishing with a 67 for a 14 under par total of 266.

His leap in the Ryder Cup table knocks Davis Love out of an automatic spot with seven weeks left in the United States race.

Londoner Brian Davis finished as top European, three closing birdies giving him a 66 and a share of 16th place on five under.

Swede Mathias Gronberg, joint eighth with a round to go, had a quintuple bogey nine on the 10th and a double bogey five at the 16th. He crashed to 53rd spot with a 77.

Collated final-round scores (USA unless stated, par 70):

266 J J Henry 68 68 63 67

269 Hunter Mahan 69 67 68 65, Ryan Moore 69 66 67 67

271 Nathan Green (Aus) 71 65 69 66

273 Woody Austin 67 70 68 68, Bubba Dickerson 69 67 70 67, Stewart Cink 69 65 72 67, Shigeki Maruyama (Jpn) 74 65 68 66

274 Nick Watney 69 67 70 68, David McKenzie (Aus) 69 69 67 69, Steve Flesch 69 70 64 71, Joe Ogilvie 72 63 69 70, Notah Begay III 68 66 71 69, Skip Kendall 68 67 74 65, Peter Lonard (Aus) 65 68 70 71

275 Brian Davis (Eng) 69 71 69 66, Jonathan Kaye 69 68 70 68, Trevor Immelman (Rsa) 70 65 68 72, Brent Geiberger 67 68 73 67, Jason Bohn 73 65 68 69

276 Robert Gamez 71 66 68 71, David Branshaw 68 71 66 71, Zach Johnson 67 69 69 71, Ben Curtis 70 68 70 68, Harrison Frazar 65 71 65 75, Ronald Whittaker 66 70 72 68, Justin Leonard 67 69 69 71, Corey Pavin 66 73 68 69, Camilo Villegas (Col) 66 70 66 74, Scott Verplank 65 69 71 71

277 Kirk Triplett 72 67 68 70, Marco Dawson 71 67 68 71, Todd Fischer 66 68 70 73, Darron Stiles 66 66 74 71, Heath Slocum 65 71 73 68, Nick O'Hern (Aus) 67 72 70 68, B.J Staten 72 68 67 70, Carl Pettersson (Swe) 66 71 73 67, Frank Lickliter II 68 68 73 68

278 John Cook 72 65 72 69, Paul Goydos 70 67 70 71, Jeff Gove 72 67 69 70, Olin Browne 67 71 72 68

279 Mike Sposa 70 70 68 71, Robert Damron 70 69 71 69, Billy Mayfair 69 71 70 69, KJ Choi (Kor) 71 68 69 71

280 Billy Andrade 69 69 73 69, Fredrik Jacobson (Swe) 73 67 70 70, Chris Couch 71 68 71 70, Daisuke Maruyama (Jpn) 71 67 69 73, D.J. Trahan 67 68 72 73

281 Doug Barron 69 70 71 71, Vaughn Taylor 69 70 72 70, Greg Kraft 68 72 69 72, Mathias Gronberg (Swe) 68 71 65 77, Fred Funk 70 69 73 69, Alex Cejka (Ger) 70 70 69 72

282 Will MacKenzie 68 72 73 69, Tim Petrovic 70 69 72 71, Ryan Hietala 70 70 73 69, Bob Tway 67 72 74 69

283 Patrick Sheehan 69 69 79 66, Tjaart Van der Walt (Rsa) 72 67 72 72, Tag Ridings 67 69 70 77

284 Kenny Perry 67 71 75 71, Troy Matteson 70 70 72 72

285 Joe Durant 71 69 70 75, John Huston 70 67 73 75, Shane Bertsch 71 65 71 78, Alex Aragon 68 72 72 73

289 Joey Sindelar 67 72 78 72, Jeff Overton 69 70 73 77