Graeme McDowell says he questioned if he was "finished" during a long win drought that came to an end with victory in the OHL Classic at Mayakoba.
McDowell, who won the U.S. Open in 2010, triumphed in a play-off against Russell Knox and Jason Bohn on Monday after the three players finished tied on 18 under at the end of a final round delayed by rain.
The Northern Irishman had not won since his success at the Open de France in July last year and had previously posted just one top-10 finish in 2015, which came at the Dubai Desert Classic in February.
But McDowell, whose run without a win on the PGA Tour stretched back to the RBC Heritage in April 2013, came through in the play-off courtesy of a stunning approach shot that set up a birdie on the 18th, the first and only hole of the three-way decider.
He told NBC's Golf Channel: "It [the win] gives me something to grab on to. You go through a year like this, you think am I finished? Am I not good enough? You ask yourself all the questions.
"I've been dreaming of this day, I said to myself that I was going to appreciate it when it came. So I'm going to appreciate this one because this year's been a grind.
"It's been a tough year but this is special, this is a nice step back to where I want to be, because I want to be back up there and I want to win more major championships, more tournaments."