NORTOn, Mass. – With the final groups now on the back nine, the Deutsche Bank Championship has turned into a three-horse race.

Rory McIlroy, at 20 under, has a two-stroke lead over playing partner Louis Oosthuizen. Tiger Woods is another stroke back.

No other players are within six shots of the lead.

McIlroy and Woods are both 4 under on their rounds, while Oosthuizen is 1 over.

Phil Mickelson, currently playing the 16th hole, is also 4 under on his round and tied with Dustin Johnson for fourth place at 13 under.

McIlroy has a shot at the 72-hole tournament record of 22 under held by Vijay Singh (2008) and Charley Hoffman (2010).