Kenny Perry fired a six-under-par 66 to win the Buick Open by a stroke over Woody Austin and Bubba Watson.

It was the second win of the season for the 47-year-old, who also won the Memorial and is now making a march toward a berth on the US Ryder Cup team, which will take on Europe in September at Valhalla in Perry's home state of Kentucky.

Perry finished on a 19-under 269 while Austin and Watson were still on the course.

Watson missed a 12-foot birdie putt on 18 that would have forced a play-off but it was Austin who really let this one get away.

The winner in 1995, Austin made a move with three straight birdies starting on 12 and then got to 20 under with a birdie at the 16th.

Nursing a one-stroke lead with two holes to play, Austin finished bogey-bogey and in a tie for second with Watson at 18 under.

Perry was recording his 11th career victory.

"I had multiple wins in '03, '05 and '08 - my forties have been pretty good for me," Perry said.

Collated final round scores & totals in the USPGA Tour Buick Open, Warwick HillsG & CC, Grand Blanc, Michigan, United States of America

(USA unless stated, par 72):

269 Kenny Perry 69 67 67 66

270 Woody Austin 66 67 69 68, Bubba Watson 67 67 68 68

271 Bob Tway 68 71 67 65, Ken Duke 69 66 69 67, Matthew Jones (Aus) 70 63 71 67

272 Lucas Glover 70 66 69 67, Brian Gay 69 68 70 65

273 Dudley Hart 64 68 70 71, John Rollins 72 64 72 65, Fredrik Jacobson (Swe) 68 66 72 67

274 Michael Letzig 69 67 69 69, Brett Rumford (Aus) 70 69 67 68, Corey Pavin 64 74 67 69, Briny Baird 65 71 68 70, Kevin Streelman 70 68 70 66

275 Charles Warren 67 68 69 71, Rodney Pampling (Aus) 71 69 65 70, Robert Garrigus 69 69 72 65, Charles Howell III 71 66 71 67, Daniel Chopra (Swe) 65 67 68 75, Bo Van Pelt 64 66 73 72, Glen Day 72 69 66 68, Scott Verplank 68 72 66 69

276 Charlie Wi (Kor) 72 65 69 70, Ben Crane 68 73 68 67, Jason Gore 68 68 71 69

277 Paul Goydos 71 70 65 71, Tom Lehman 71 67 70 69, Marc Turnesa 71 69 69 68, Rocco Mediate 71 69 67 70

278 Craig Barlow 70 69 67 72, Ryan Palmer 70 66 71 71, Tag Ridings 67 70 71 70, Stephen Leaney (Aus) 67 70 70 71

279 Nick Watney 69 66 76 68, Charley Hoffman 70 70 72 67, Chris Riley 71 69 72 67, Jim Furyk 68 72 68 71, Jimmy Walker 72 65 72 70, Lee Janzen 67 73 70 69, J.P. Hayes 71 68 74 66, Todd Hamilton 70 66 70 73, Shigeki Maruyama (Jpn) 66 75 69 69

280 Billy Mayfair 69 70 69 72, Todd Demsey 68 67 71 74, Peter Lonard (Aus) 70 68 73 69

281 Tom Byrum 67 69 72 73, Brad Elder 67 71 72 71, Cameron Beckman 74 67 71 69, Mark Hensby (Aus) 71 68 69 73, Jon Mills (Can) 66 69 73 73, Shane Bertsch 71 69 70 71, Nick O'Hern (Aus) 68 72 70 71

282 Michael Bradley 73 68 70 71, Justin Leonard 71 68 72 71, Harrison Frazar 68 69 73 72, Tim Wilkinson (Nzl) 71 70 71 70

283 Kyle Thompson 71 70 72 70, Gavin Coles (Aus) 71 69 68 75, Heath Slocum 72 69 71 71, Kenneth Ferrie (Eng) 66 73 74 70

284 Kevin Stadler 70 70 68 76, Bob Estes 70 71 71 72, Mathew Goggin (Aus) 68 72 73 71

285 Dustin Johnson 68 70 72 75, Jay Williamson 68 73 70 74, James Driscoll 72 68 71 74, Mark Brooks 70 71 72 72

286 Billy Andrade 71 70 71 74, Chris DiMarco 70 68 74 74

287 Justin Bolli 70 70 71 76

288 Paul Claxton 69 70 74 75, Dicky Pride 69 71 73 75

289 John Huston 71 70 71 77