For McDowell it was his second victory in the event having defeated Tiger Woods in a playoff in 2010.
McDowell has slipped to 24th position in the World Ranking prior to this week but after taking the lead in round two he never really look back and although Bradley closed within two through the latter stages of today's round McDowell's victory never really seemed in doubt.
Bradley did well to put behind him an ill-informed comment from a fan on Saturday who had accused him of cheating because of his use of the belly putter.
Bo Van Pelt finished four shots behind Bradley while Rickie Fowler, Tiger Woods and Jim Furyk tied for 4th.
Jason Day was the only Australian in the field and finished 15th after a final round of 69.