Phil Mickelson became the oldest major winner in golf history after claiming the US PGA Championship.
Mickelson made history thanks to the 50-year-old American's two-stroke victory at Kiawah Island on Sunday, eclipsing Julius Boros (48 years and four months at the 1968 PGA Championship).
A final-round 73 saw Mickelson clinch a second PGA Championship title, having also tasted success in 2005, and sixth major crown.
Mickelson's remarkable triumph at six under ended an eight-year major drought after last reigning supreme via the 2013 Open Championship, while he had not won on the PGA Tour since 2019.
Louis Oosthuizen (73) and four-time major champion Brooks Koepka (74) – a two-time PGA Championship winner – finished tied for second in South Carolina.
Mickelson carried a one-shot lead over Koepka into the final round and he had to overcome a slow start in his stunning title pursuit.
It was a tough and chaotic front nine for Mickelson, who bogeyed his opening hole and dropped the third, having responded with a birdie.
Mickelson mixed a pair of birdies with a bogey from the fifth to the seventh hole approaching the turn.
A birdie at the 10th boosted Mickelson, who then holed back-to-back bogeys after his approach shot at the 13th found water.
History. pic.twitter.com/Mo05ipC3Hm— PGA TOUR (@PGATOUR) May 23, 2021
Mickelson recovered to gain a stroke at the 16th and while he bogeyed the 17th, Koepka and Oosthuizen were unable to take advantage after also ending the deciding round over the card.
Shane Lowry (69), Padraig Harrington (69), Harry Higgs (70) and Paul Casey (71) earned a share of fourth position – four strokes behind Mickelson.
Defending champion Collin Morikawa's bid for back-to-back titles ended in a tie for eighth spot, alongside the likes of Jon Rahm (68), Justin Rose (67), Rickie Fowler (71) and Masters runner-up Will Zalatoris (70), while Masters champion Hideki Matsuyama (72) closed out the event tied for 23rd.
Former world number one Jordan Spieth and his quest to claim a career Grand Slam resulted in a share of 30th at two over, a stroke better off than reigning U.S. Open champion Bryson DeChambeau (77).
As for four-time major winner Rory McIlroy, he ended the tournament in disappointing fashion with a 72 to finish five over.