Adam Scott sank a birdie from nearly 50 feet to beat Ryan Moore in a play-off at the EDS Byron Nelson Championship.

After missing several much shorter putts during the final round, Scott found his range to see off Moore at the third extra hole at the Four Seasons TPC.

Scott, who frittered away a three-shot lead during the final round, had to birdie the final hole of regulation play just to force extra holes with the fast-finishing Moore.

But the Australian sank a nine-footer to tie with the American on a seven-under-par 273, four strokes clear of Bart Bryant.

Scott had good chances to win at the first two extra holes, missing birdie putts from 16 and 12 feet, before ending it at the next, the par-four 18th.

"I got away with one today," Scott said after clinching his sixth official PGA Tour victory, his 14th worldwide.

"I dug it out of nowhere and obviously found my range. I hit it too close the other holes."

Moore, the 2004 United States amateur champion, said: "You expect a guy like that to make a putt in that situation.

"It didn't surprise me at all."

Moore came from three shots behind, shooting a closing 68 to Scott's 71 in strong northerly winds.

Collated final round scores from the US PGA Tour's EDS Byron Nelson Championship at The TPC at Four Seasons GC in Irving, Texas (USA unless stated, par 70):

273 Adam Scott (Aus) 68 67 67 71 (Scott won at the third pay-off hole), Ryan Moore 67 70 68 68

277 Bart Bryant 72 66 67 72

278 Mark Hensby (Aus) 69 67 73 69, Carl Pettersson (Swe) 74 68 67 69, Nicholas Thompson 69 72 70 67

279 Dudley Hart 70 70 66 73, Charlie Wi (Kor) 71 70 70 68, Charley Hoffman 69 68 68 74, Brian Gay 72 67 68 72, Roland Thatcher 69 68 72 70, Kevin Sutherland 68 70 67 74

280 Scott McCarron 70 66 73 71, Eric Axley 67 74 68 71, Jeff Gove 69 71 70 70, Briny Baird 68 72 70 70, Jesper Parnevik (Swe) 68 70 68 74, Frank Lickliter II 73 65 72 70

281 Tim Herron 74 69 67 71, Nick Flanagan (Aus) 71 69 72 69, Anthony Kim 73 70 68 70, Justin Leonard 71 66 74 70, Mathew Goggin (Aus) 67 69 72 73, Sergio Garcia (Spa) 71 70 65 75, Luke Donald (Eng) 72 68 68 73, Shane Bertsch 74 66 70 71

282 Michael Bradley 69 72 70 71, Shaun Micheel 68 74 72 68, John Senden (Aus) 73 68 71 70, Johnson Wagner 69 73 70 70

283 Richard Johnson (Wal) 72 71 75 65, Nick Watney 75 68 68 72, Jeff Quinney 71 72 68 72, John Mallinger 73 66 71 73

284 Jeff Overton 72 68 76 68, Bo Van Pelt 73 70 72 69, Ian Poulter (Eng) 68 73 71 72, Ken Duke 70 70 68 76, Corey Pavin 72 70 68 74, Jimmy Walker 75 66 69 74, Ted Purdy 72 69 70 73

285 Hunter Mahan 71 68 72 74, Steve Marino 73 68 70 74, Billy Mayfair 71 71 69 74, Matt Kuchar 71 71 70 73, Parker McLachlin 68 69 74 74

286 John Rollins 74 69 68 75, Craig Kanada 69 74 67 76, Cliff Kresge 69 72 71 74

287 Kevin Na (Kor) 71 67 73 76, Kenny Perry 72 67 69 79, Y. E Yang (Kor) 70 70 71 76, George McNeill 72 70 71 74, Stuart Deane 70 69 72 76, Tom Pernice Jnr. 71 71 70 75, Tommy Armour III 69 70 74 74

288 Michael Sim (Aus) 70 71 71 76, J J Henry 72 71 69 76, Brett Quigley 72 71 72 73, Chad Collins 73 67 74 74

289 Patrick Sheehan 74 68 72 75, Scott Verplank 72 69 73 75

290 Dustin Johnson 68 73 73 76, Jon Mills (Can) 73 68 77 72, Martin Laird 74 69 72 75

291 Stephen Leaney (Aus) 71 72 75 73, Todd Hamilton 71 68 74 78

292 Nathan Green (Aus) 72 71 74 75, Joe Durant 70 71 75 76, Alejandro Canizares (Spa) 69 73 74 76, Olin Browne 72 71 71 78

293 Shigeki Maruyama (Jpn) 70 73 73 77

294 Joe Ogilvie 70 69 79 76

295 Omar Uresti 73 70 73 79

297 Paul Stankowski 71 71 75 80

299 Brad Elder 71 72 79 77