American Dustin Johnson fired a three-under par 69 to win the WGC-Cadillac Championship by one stroke on Sunday as Rory McIlroy again struggled.
Overnight leader J.B. Holmes, who started the round with a five-shot lead, finished second.
Rory McIlroy shot an even-par 72, leaving him one-under for the week.
Speaking after the event, McIlroy said: "The game's just not quite there. I've got a week off now to try and work on it a little bit.”
Masters champion Bubba Watson, who lead by two strokes after nine holes, finished alone in third place.
Shane Lowry was tied for 17th at one over after a final-round 74, while Graeme McDowell finished on plus 10.
Meanwhile, Trevor Fisher jnr won the Africa Open while veteran Alex Cejka won a five way play-off in the Peurto Rico Open.