Shane Lowry struggled to a final round 76 at the Phoenix Open as Nick Taylor rode a late surge to secure victory in the second hole of a play-off against Charley Hoffman at TPC Scottsdale.
Lowry, who played 31 holes in a marathon Saturday after rain played havoc with the schedule, resumed on Sunday with four holes to play to complete his third round.
Birdies at the last two holes ensured a 68, but the scoring proved more difficult in the final round, with three bogeys in his opening seven holes.
A birdie at the ninth proved to be Lowry's only one of the round with bogeys at 11, where he went out of bounds, and 12, where he two-putted after finding a greenside bunker.
The 36-year-old found sand twice at the final hole on his way to another dropped shot, meaning he carded a five-over par round of 76. That saw him fall to three under, 18 shots adrift of Taylor and Hoffman.
Seamus Power closed with a 69 to finish on one-under par.
The Waterford native moved to four-under with a birdie at the sixth – his 15th hole – but bogeys in the final two holes saw him drop into a tie for 66th overall.
Tournament victory went to Canadian Taylor who birdied three of his final four holes to force the play-off against America's Hoffman, who soared to the top of the leaderboard with a fourth-round score of 64.
After each man birdied the first extra hole, Hoffman left his birdie attempt short, leaving the window open for Taylor to sink a birdie putt from 11 feet and clinch the title.
It closed out what had been a frantic final day with Zach Johnson and Billy Horschel earlier exchanging angry words with spectators.
Johnson was filmed remonstrating with fans at TPC Scottsdale and could be heard telling them "I'm sick of it" before demanding they "just shut up".
It was not apparent from the clip, which was posted on social media, what prompted the former US Ryder Cup captain to lose his temper.
In a separate incident, Horschel was seen remonstrating with a spectator for calling out while one of his playing partners, qualifier Nicolo Galletti, was about to hit a shot.
"Buddy, when he's over a shot shut the hell up man," Horschel shouted.
"He's trying to hit a damn golf shot here - it's our f****** job."
The WM Phoenix Open is easily the best attended tournament in golf, but the behaviour of some fans has again attracted more attention than the golf itself.
One man was arrested after jumping over the ropes and diving into a greenside bunker on the par-three 16th, where he proceeded to perform 'snow angels' in the sand.
Tournament officials were forced to shut spectator gates earlier than planned after being overwhelmed by the turnout and sales of alcohol were temporarily halted.
Former BMW PGA Championship winner Byeong Hun An took to social media to brand the event a "s**t show" which was "totally out of control on every hole".
He added: "Played here multiple times over the years and it was fine until today."
Additional reporting: PA
