DORAL, Fla. — A month after he returned from his curious leave of absence, Dustin Johnson was posing with another big trophy. In a power show Sunday on the Blue Monster, Johnson was flawless on the back nine and blasted two big drives to finish off a 3-under 69 and win the Cadillac Championship for his second World Golf Championship title. Johnson took advantage of a collapse by J.B. Holmes, who lost a five-shot lead and closed with a 75 to finish one shot behind. Masters champion Bubba Watson opened with four birdies in seven holes to lead by two … Continue reading