After exchanging verbal blows on social media, Phil Mickelson teamed up with Joel Dahmen and took on Harry Higgs and Keith Mitchell at Liberty National Golf Club.
Rory McIlroy is bidding to become the first player to win three FedEx Cups this season and before teeing off at the Northern Trust on Thursday, he showed off some great ball skills.
Not only are the players competing to win the Northern Trust, but they are also trying to qualify for the 70-man field at the BMW Championship next week.