Tom Watson missed out on the chance to become the oldest major winner in history after the 59-year-old's game fell apart in a playoff with fellow American Stewart Cink.
|Joy for Cink as he wins his first major [AFP]
Watson, bidding for a record-tying sixth Claret Jug, squandered his chance when he missed an eight-foot par putt on the 72nd hole.
Cink, who had earlier rolled in a 15-footer there for a birdie three to take the clubhouse lead on two-under 278 at Turnberry's Ailsa Course, took advantage to seal his maiden major title.
He won the first extra hole, the fifth, with a par when Watson collected a bogey five after hitting his approach into a greenside bunker.
Cink when you're winning
They each parred the second extra hole, the par-three sixth, before Cink effectively sealed the win at the par-five 17th with a two-putt birdie.
Watson double-bogeyed the hole after driving into thick rough on the right and taking two more shots to reach the fairway.
"Extraordinary doesn't even tip the iceberg," Cink told The BBC afterwards.
"I grew up watching Tom Watson playing on TV, just wanting to be like him let alone play against him in a major championship.
"I feel so happy just to be a part of it."
One of the most remarkable major championships of all time finally ended with Watson having to settle for second place in pursuit of a ninth major title.
He had been aiming to shatter golf's previous record for the oldest major winner, compatriot Julius Boros having clinched the 1968 US PGA Championship at the age of 48.
The duo finished the regulation 72 holes on two under, Watson bogeying the last for a 72 and Cink closing with a 69.
Lee Westwood, who eagled the par-five seventh for a brief two-stroke lead, faltered after the turn on the way to a 71 and a tie for third with fellow Briton Chris Wood (67).
Double US Open champion Retief Goosen of South Africa eagled the 17th for a 72 to share fifth place with Britain's Luke Donald (67) and Australian Mathew Goggin (73).