No lead is safe at Coors Field. That’s no cliche. Colorado’s six-run rally in the eighth inning Tuesday night seemed to put them comfortably ahead, 8-2. Seemed to. But the Arizona Diamondbacks stormed back in the ninth against relievers Phillip Diehl and Jairo Diaz to score five runs. It was left to Daniel Bard to close out the 8-7 victory.