Sean O'Hair was unsure whether he will accept an invitation to play in this week's Open after securing victory at the John Deere Classic in Illinois on Sunday night.

O'Hair, 23 on Monday, collected his first PGA Tour title after firing a bogey-free six-under-par 65 for a one-stroke victory.

He began the day six shots behind JL Lewis but finished strongly to collect over £400,000 and an invitation to St Andrews.

However, whether he will make the trip to Scotland remains to be seen for the home-loving family man who doesn't even have a passport.

"That's going to be a very difficult decision for me," said O'Hair. "I don't do things based upon my career. I do things based upon my family, and I don't know if that's going to work out for me and my family."

There was a time when all of the advice O'Hair received came from his father. Once a teenage prodigy, he turned pro at 17 before the relationship dissolved.

He has not spoken to his father since his wedding in December 2002 and now receives support from his wife, Jackie, and her parents, Kathy and Steve Lucas. He also has a toddler daughter.

"I had a tough situation when I was a kid. That's the easiest way to put it," said O'Hair. "It just was not a happy situation, and there was a lot of pressure there, and I just think now it's the exact opposite."

At last month's Byron Nelson Championship, O'Hair gave away the final-round lead to Ted Purdy but this time he turned the tables as he hurdled 10 golfers on the leaderboard and became the seventh first-time winner on the US tour this year.

After posting a score of 16 under 268, O'Hair saw several players catch him but never pass him.

And as he waited out the prospect of a play-off, he saw both former champion Lewis and Hank Kuehne stumble down the home stretch.

Lewis, the 1999 champion and a runner-up in 2003, was tied for the lead with two holes to play but finished bogey-bogey to complete a one-over 72. He had begun the day with a three-shot lead.

Kuehne birdied the 17th to move within a stroke of O'Hair and appeared in position to force a play-off when he blasted his drive at the par-four 18th an astonishing 375 yards through two tall trees, leaving himself just 94 yards to the hole.

But Kuehne's wedge approach was a bit strong and stopped in the fringe, 15 feet from the cup.

He left the tough putt short, finishing with a 68 to share second with Robert Damron (67).

Lewis was at 270 with defending champion Mark Hensby, whose 64 was the best round of the day, and Wes Short Jr, who shared the lead with Lewis at the turn but bogeyed 17 and settled for a 66.

All eyes were on Michelle Wie at the start of the tournament, but the 15-year-old missed the cut by two strokes.

Collated final-round scores (USA unless stated, par 71):

268 Sean O'Hair 66 69 68 65

269 Hank Kuehne 68 66 67 68, Robert Damron 65 68 69 67

270 Wes Short jr. 66 67 71 66, J.L. Lewis 64 65 69 72, Mark Hensby (Aus) 70 66 70 64

271 Hunter Mahan 63 68 74 66, Richard S Johnson (Swe) 65 68 68 70, Shigeki Maruyama (Jpn) 68 63 72 68

272 D.J. Trahan 68 69 67 68, Kevin Stadler 72 63 69 68, Jeff Brehaut 66 70 66 70

273 Heath Slocum 68 69 67 69, Jonathan Byrd 70 69 70 64, Craig Bowden 65 68 68 72, Esteban Toledo (Mex) 70 67 69 67, Carlos Franco (Par) 68 68 67 70, Matt Kuchar 71 67 67 68, Todd Hamilton 68 67 70 68

274 Brandt Jobe 66 66 72 70, Robert Gamez 74 65 67 68, Brendan Jones (Aus) 66 73 66 69, Joey Sindelar 70 69 69 66, Woody Austin 72 65 68 69, Garrett Willis 66 72 68 68, Phillip Price (Wal) 69 69 67 69, Justin Bolli 69 66 73 66, Ryan Palmer 66 68 74 66

275 Joey Snyder III 67 66 70 72, Billy Mayfair 68 69 70 68, Omar Uresti 72 66 73 64, Stewart Cink 68 70 67 70, Steve Lowery 66 73 70 66, John Senden (Aus) 69 67 69 70, Brett Wetterich 68 68 70 69

276 Matt Gogel 70 69 69 68, Kevin Sutherland 70 69 68 69, Zach Johnson 68 69 66 73, Glen Hnatiuk (Can) 65 71 69 71

277 John Huston 67 71 72 67, David Toms 67 72 69 69, Michael Long (Nzl) 73 66 69 69, Roland Thatcher 71 68 69 69, Duffy Waldorf 66 71 69 71, Tom Gillis 68 69 70 70

278 Matt Davidson 71 67 71 69, Patrick Sheehan 69 68 72 69, Blaine McCallister 68 67 72 71, Steve Stricker 71 66 71 70, Scott Gutschewski 71 66 70 71, John Maginnes 70 67 68 73, David Hearn (Can) 68 70 69 71, Paul Claxton 66 72 70 70, Steve Jones 68 71 71 68, Guy Boros 68 69 69 72, Dudley Hart 69 70 70 69, Will MacKenzie 67 67 74 70

279 Jason Knutzon 69 70 70 70, Arjun Atwal (Ind) 70 68 69 72

280 Stephen Leaney (Aus) 70 68 69 73, Darron Stiles 68 68 71 73, Bob Heintz 69 68 70 73

281 Paul Goydos 69 68 75 69, Kent Jones 70 69 71 71, Brenden Pappas (Rsa) 67 71 72 71

282 Glen Day 66 70 76 70, Michael Bradley 69 70 72 71, Jeff Sluman 67 66 77 72

283 Jeff Maggert 71 67 73 72

284 Dean Wilson 67 69 74 74

285 Mario Tiziani 71 68 71 75

286 Mike Springer 68 71 73 74

287 Grant Waite (Nzl) 68 70 78 71, Olin Browne 69 70 74 74, Arron Oberholser 68 71 74 74

290 Ted Purdy 69 68 75 78