JB Holmes earned a surprise win at the Genesis Open in California as Justin Thomas suffered a final round collapse on Sunday.
Thomas, the world no.4, held a three-shot lead going into the closing round, but failed to recover after bogeying 3 of his first 4 holes.
A double-bogey at the 12th added to his struggles and he eventually signed for a four-over par round of 75, having made scores of 66, 65 and 65 over the first three days of the tournament.
Holmes, who opened with a 63 on Thursday, needed only a one-under round of 70 to snatch the title, his first in almost four years.
There were strong performances from several other big name players, with Rory McIlroy, Dustin Johnson, Jon Rahm, Tiger Woods, Bryson DeChambeau and three-time champion Bubba Watson all finishing inside the top 15 at Pacific Palisades.
However, there was further disappointment for Jordan Spieth, who led after a brilliant first round of 64. He fell away from the top of the leaderboard with rounds of 70 on both Friday and Saturday, before a 10-over score of 81 to finish.
Spieth continues to be one of four co-favourites to win The Masters in April at general best odds of 12/1*, but his form remains a major concern.
Since finishing third at Augusta last year he has posted a single top 10 in 18 starts, slumping from third to 24th in the rankings. Johnson, McIlroy and Justin Rose are the others at 12/1*, Woods is a 14/1* chance with Bet365 and Thomas is available at 16/1 with the same bookmaker.
|*All odds quoted are subject to change|