Playing in the penultimate group, Horschel’s birdie on the 18th hole gave him a marginal lead over Canter who was in the last pair.
And a day after what would have been Palmer’s 92nd birthday, it was a special moment for the Florida native.
Horschel was one of the American golfers who narrowly missed qualifying for Steve Stricker’s Ryder Cup team, but that didn’t seem to bother him.
He came out of the blocks shooting in Sunday’s final round, posting three birdies and no bogey on the first nine holes.
And in the home stretch, with increasing pressure at the top of the standings, Horschel dodged any bogey and carded four more birdies to put him in the lead.
By winning the flagship event of the European Tour, Horschel becomes the first American to win a Rolex Series event.
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