Chuck Nazty can do no wrong in this town. Denver loves everything about him, from his Duck Dynasty beard to a walk-up song so bad it’s cheesy good. But in order to do right by a weary Charlie Blackmon, the Rockies need to make a tough call and take action he won’t like. It is time for David Dahl to supplant Blackmon as Colorado’s center fielder. Why now? Well, why wait until after the Rockies slip slowly from playoff contention? On a hot Thursday night in LoDo, Colorado lost 8-5 to the Los Angeles Dodgers.