When looking for reasons that the Rockies will execute a U-turn, it doesn't hurt to start with Aaron Cook (1-1, 5.67 ERA). He has returned to all-star form, regaining his heavy sinker while also showing the ability to use a breaking ball that showed such promise in spring training. Hanley Ramirez (3-for-7 vs. Cook) and Emilio Bonifacio (4-for-6) must be controlled. Chris Volstad (2-1, 2.97) has held opponents to a .192 average. But he's vulnerable to the long ball, having allowed five home runs. Troy E. Renck, The Denver Post