In this task, you are given an article. Your task is to summarize the article in a sentence.
Q: The Northern Irishman started six shots behind overnight leader Paul Casey, but seven birdies in a six-under-par 65 saw him finish two shots clear at 15 under.
England's Casey, 39, missed an eagle putt on the final hole at TPC Boston that would have forced a play-off.
It was 27-year-old McIlroy's first tournament win since the Irish Open in May and first PGA title since May 2015.
The victory comes just a week after he changed his putter and putting coach.
"I knew my game was in good shape, I just needed to do something with the putting," said McIlroy. "I found something.
"I still need to keep going with it, it's definitely not the finished article, but it's a big step in the right direction.
"I'm excited with how my game is and what I've found this week, and hopefully I can keep it going for the next couple of tournaments, but ultimately into the Ryder Cup."
The Deutsche Bank Championship is the second of the four that make up the season-ending FedEx Cup.
McIlroy will rise 34 places to fourth in the FedEx Cup standings - and nearer the $10m (£7.52m) prize for the winner - as a result of his victory.
The competition features the top 100 players in the world. The leading 70 after this weekend progress to next week's BMW Championship, where the field will be reduced to 30 for the Tour Championship on 22-25 September.
A: 
Rory McIlroy won the Deutsche Bank Championship to claim his first PGA Tour title for 16 months.