Little-known rookie Ryan Palmer came from five shots behind in Sunday's final round to score a shocking victory in the £2.5million Funai Classic at Disney World.

Ranked 217th in the world, Palmer raided the Magnolia course for 10 birdies in a bogey-free round.

His spectacular 10-under-par 62 was the best final round by a winner on the PGA Tour this year.

Taking advantage of ideal conditions, the 28-year-old Palmer finished at 22-under 266, three shots ahead of defending champion Vijay Singh, who shot 67, and Briny Baird, who carded a 70.

He collected £420,000 and - just as importantly - a two-year tour exemption.

Singh, the world's top-ranked player, was seeking his ninth victory of the year. He was still in the hunt until he bogeyed the 16th hole.

Collated final round scores in the USPGA Tour Funai Classic, Magnolia GC, Walt Disney World Resort, United States of America

(USA unless stated, par 72):

266 Ryan Palmer 68 68 68 62

269 Briny Baird 65 66 68 70, Vijay Singh (Fij) 66 71 65 67

270 Joey Sindelar 66 70 67 67, Cameron Beckman 68 65 68 69

271 Tim Clark 69 69 64 69, Mark Calcavecchia 71 66 65 69, Mark Hensby (Aus) 64 71 68 68, Tom Lehman 66 66 67 72

272 John Huston 64 71 69 68, Vaughn Taylor 68 66 72 66, Geoff Ogilvy (Aus) 68 67 67 70, Lucas Glover 68 68 68 68, Neal Lancaster 69 69 67 67, Carl Pettersson (Swe) 70 70 68 64

273 Billy Andrade 69 69 69 66, Chris DiMarco 69 65 70 69, Jerry Kelly 67 68 71 67, Skip Kendall 66 67 72 68, Ben Curtis 66 71 66 70, Bart Bryant 66 71 67 69, Scott Verplank 70 65 65 73, Dan Forsman 68 70 66 69

274 Kirk Triplett 66 67 72 69, J.L. Lewis 62 73 72 67, Justin Rose (Eng) 71 68 69 66, Loren Roberts 71 67 66 70

275 Spike McRoy 68 72 71 64, Richard S Johnson (Swe) 68 67 71 69, Stephen Ames (Can) 65 71 67 72, Zach Johnson 68 72 68 67, Scott McCarron 69 67 68 71

276 Pat Perez 69 71 66 70, Stephen Leaney (Aus) 70 69 68 69, Brian Bateman 68 70 67 71, Steve Lowery 72 67 67 70, Craig Perks (Nzl) 73 65 70 68, Joe Durant 69 70 71 66, Steve Allan (Aus) 67 72 71 66, Arjun Atwal (Ind) 68 71 73 64

277 Jose-Maria Olazabal (Spa) 65 72 69 71, Fredrik Jacobson (Swe) 69 70 68 70, Brian Gay 67 72 68 70, Bob Estes 69 70 69 69, Brenden Pappas (Rsa) 67 67 74 69, Fred Funk 69 69 71 68, Steve Flesch 67 71 71 68, Michael Allen (Irl) 73 67 69 68

278 John Rollins 68 71 70 69, Omar Uresti 67 71 70 70, Hank Kuehne 69 64 71 74, Paul Goydos 70 70 66 72, Daniel Chopra (Swe) 67 71 68 72, Carlos Franco (Par) 69 71 69 69

279 Robert Gamez 68 71 70 70, Chad Campbell 69 67 70 73, Michael Clark II 67 71 72 69, Harrison Frazar 67 67 70 75, J J Henry 69 68 70 72, Deane Pappas (Rsa) 70 70 69 70, Danny Ellis 69 71 70 69

280 David Frost (Rsa) 71 68 68 73, Dean Wilson 69 71 68 72, John Cook 68 70 71 71, Matt Kuchar 69 70 71 70, Charles Howell III 67 71 72 70, Jeff Maggert 68 71 70 71

281 Rodney Pampling (Aus) 69 69 71 72, Hunter Mahan 69 70 71 71, Kent Jones 69 70 71 71, Ben Crane 71 69 72 69, Stuart Appleby (Aus) 69 66 73 73, Lee Janzen 71 69 70 71

282 Shaun Micheel 69 71 72 70, Rich Beem 70 70 70 72, Bob Tway 69 71 72 70, Tom Pernice Jnr. 67 69 74 72, Arron Oberholser 69 71 72 70

284 Bob Burns 69 70 75 70, Esteban Toledo (Mex) 73 67 71 73

285 Tom Carter 69 70 72 74, Jay Williamson 68 68 76 73

286 David Branshaw 67 73 73 73, Jose Coceres (Arg) 70 70 70 76

288 Gene Sauers 69 71 73 75

291 Ken Duke 72 64 75 80