CARMEL, Ind. (AP) - Dustin Johnson plays a different game than anyone else, and he wanted to keep it that way.Right down to his putter.The U.S. Open champion made a late change just before starting the BMW Championship, and so far he has no complaints. Johnson finished with four birdies over the last five holes Saturday on soggy Crooked Stick for a 4-under 68, stretching his lead to three shots going into the final round.