Jason Day wins BMW Championship by six strokes after final round 69, claims world number one ranking for first time. Jason Day claimed his fourth victory in six starts and surged to the world number one ranking after going wire-to-wire to win the BMW Championship by six shots on Sunday (September 20). The Australian closed out his tournament with a two-under-par 69 to finish at 22-under 262 at Conway Farms, six clear of American rookie […]