Finally with a new driver, Dustin Johnson uses Caves Valley experience to opening 67

Dustin Johnson got off on the wrong foot in his FedExCup title defense, missing The Northern Trust cut because of a broken driver dilemma. But a new driver meant a new player at the BMW Championship.

Before Round 1 at Liberty National, Johnson noticed a crack in the crown of his TaylorMade SIM2 driver and played with a 3-wood. Unable to find a satisfactory replacement for Round 2, fellow U.S. Open champion Lucas Glover loaned Johnson his backup, but Johnson shot a 72 and had an extra three days' rest, compared to many in this week's field.

But with Johnson safely in the BMW Championship, he had plenty of time to find a new SIM2, which he drove straight to an opening-round 67, his…