FORT WORTH, Texas (AP) – Zach Johnson shot a 2-over par 72 in the final round of the PGA’s Colonial, but finished play on top by one stroke over Jason Dufner. The last round was a tough one for Dufner, the leader after three rounds, as he shot a 4-over-74. Johnson got the win despite a double bogey on the 18th hole.  Dufner’s 74 included two double bogeys, two bogeys and three birdies.