Will be updated. With AP Photos.
Rose, a one-time Orlando resident, is top-3 finisher twice at Bay Hill (2011, 2013) and would like add the API to his eight PGA Tour wins.
McIlroy fired an eight-under par 64 to finish 72 holes on 18-under 270 and defeat DeChambeau by three strokes.
Woods, a 14-time major victor and eight-time champion at the Orlando course, opened and closed the front nine with bogeys but rallied late to shoot a level-par 72 and stand seven shots back on 140 after 36 holes as he works to find consistent top form ahead of next month's Masters.
"I think that I didn't really miss a shot the last six holes", said Stenson, who was at 12-under 204.
Patrick Reed, who bogeyed the 72nd hole in the Valspar Championship to miss out on a play-off with Casey, was alongside Woods on four under, with England's Justin Rose a shot behind after a remarkable fightback.
Fowler immediately slipped back with a long-range three-putt bogey at the 13th, with Stenson edging back ahead with a close-range gain on the par-five 12th.
Woods made another bold play on the par-5 16th, this time with his ball near the lip of a bunker.
Although McIlroy's birdie run came to an end with a two-putt par at the 17th, the 28-year-old sealed victory in style by draining a 25-foot gain at the last to get to 18 under for the week.More news: Plane crashes into a house in Phillipines, 10 killed
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"I'm going to have to shoot a low one tomorrow and probably get a little bit of help", Woods said.
In trademark fashion, 14-time major victor Woods refused to rule himself out of the contest as he chases a ninth victory at Bay Hill. His lone comeback was from five shots behind in 2009, when he beat Sean O'Hair with a 67 in the final round.
Stenson and McIlroy were tied for the lead early on the back nine, but McIlroy ripped off birdies on 13, 14, 15 and 16 to jump to 17 under and lead by three. He led by as many as two shots on the front nine before the putts stopped falling.
That's about when McIlroy pulled away.
"Today was a hard fight, it was a grind", he said.
He paused to smile before mentioning players who were lurking.
"I wish I walked up that hill to get a handshake from him but I'm so glad to put my name on that trophy".
MASTERS favourite Tiger woods will need one of his vintage performances at the Arnold Palmer Invitational on Monday morning if he is to break a US PGA Tour win drought of nearly five years. He has a chance to change that, which is all he wanted.
'If you would have asked me at the beginning of the year if I'd have a chance to win two tournaments, I would have taken it in a heartbeat, ' Woods said. I don't know, I think it's gotten a little much, to be honest. "I had three different shots".
He finished bogey-bogey-par for a 3-under 69 and tumbled down the leaderboard into a tie for fifth. If that wasn't enough, McIlroy chipped in from 40 feet on the 15th hole, and then pounded a 375-yard drive on the 16th that set up a two-putt birdie. "I knew if that could translate from practice onto the course, I could have a good week". "Some went in, some didn't".