Dustin Johnson wins WGC as Jason Day collapses

Dustin Johnson chased down Jason Day to win the WGC Bridgestone Invitational and move to world number two in the rankings.

Following back-to-back wins at the US Open and WGC Bridgestone Invitational, Johnson, 32, is now up to a career high in the official world golf rankings behind Day. 

Johnson started the final round at Firestone three shots off the pace but stormed home with a consecutive round of 66.

Day appeared to be cruising on 7-under standing on the 15th tee but finished bogey, double bogey, par, bogey to tumble back into third on 3-under.

"It's the first time I've won two tournaments in a row," said Johnson, who went on to win by one shot over Scott Piercy.

"I mean, that's big. I'm excited and looking forward to going over to the British with the golf game in good form."

In the bag

Driver: TaylorMade M1 460 (10.5 degrees; Fujikura Speeder Evolution 2.0 Tour Spec 661X)

3-wood: TaylorMade M1 (17 degrees)

Irons (2): TaylorMade Tour Preferred UDI; (3-PW): TaylorMade Tour Preferred MB 14

Wedges: TaylorMade Tour Preferred EF (52 and 60 degrees)

Putter: Scotty Cameron by Titleist prototype

Ball: TaylorMade Tour Preferred X

Leaderboard

-6 D Johnson (US)
-5 S Piercy (US)
-3 J Day (Aus), J Spieth (US), M Kuchar (US), K Chappell (US)