[3] Phil Mickelson shot a final round 66 (−5) to win his fifth major title, three strokes ahead of runner-up Henrik Stenson.

Ian Poulter, Adam Scott, and 54-hole leader Lee Westwood tied for third, four back of Mickelson.

First and anyone tying for 1st place on the Order of Merit of the Southern Africa PGA Sunshine Tour for 2012 21.

First 2 and anyone tying for 2nd place, not exempt, on the Official Money List of the Japan Golf Tour for 2012 23.

First 2 and anyone tying for 2nd place, in a cumulative money list taken from all official 2013 Japan Golf Tour events up to and including the 2013 Mizuno Open.

The Mark H. McCormack Medal winner for 2012 To make up the full entry of 156, additional players were drawn from the Official World Golf Ranking dated 7 July 2013[17] (provided the player was entered in the Open and did not withdraw from qualifying).

Two Spaniards, 49-year-old Miguel Ángel Jiménez and Rafa Cabrera-Bello, had also reached 5-under before late bogeys, as had veteran Mark O'Meara.

Defending champion Ernie Els shot 74 (+3), tarnished by a triple-bogey after bunker trouble at the 16th.

[20] World number one Tiger Woods, playing in the tough later conditions, opened with a bogey after snap-hooking his tee shot and taking an unplayable lie, but fought his way back to 69 (−2) in pursuit of his 15th major championship.

[21] Out-of-form world number two Rory McIlroy, however, struggled to a 79 (+8) despite an early tee time.

Phil Mickelson, four-time major champion and the winner of the previous week's Scottish Open, also had a 69 despite a closing bogey.

Woods held sole possession of the lead early in the round, but carded 72 (+1) to fall back to 212 with Mahan.

[27] Mickelson, who started the round five shots back, carded a 34 (−2) on the front nine to get to even-par for the championship.

Ian Poulter got hot in the middle of his round and posted a 67 (−4) to tie for third with Scott and Westwood.

"[27] Mickelson agreed, saying "I don't care how I got it, [the Claret Jug trophy] ...it just so happened to be with one of the best rounds of my career ...