by Jeff FletcherFiled under: Rockies, MLB InjuriesSAN FRANCISCO -- After throwing two simulated innings on Tuesday, Rockies Opening Day starter Aaron Cook said he is healthy, and he expects to be ready to pitch for Colorado in the postseason, if the Rockies get there."It's not an issue," Cook told FanHouse. "I'm healthy. It's just a matter of throwing my pitches and getting back to where I need to be stamina-wise and getting position to where I can go out there. My ...