I don't think he's using the curve enough. He probably belongs in the bullpen if blisters have rendered him a fastball/changeup guy, if indeed blisters are what's responsible for the reduced curve usage.
Wow, not only is Garrett Cooper struggling mightily with a 33% K-rate and 57 wRC+, but now he's on the DL with a wrist injury. What a NIGHTMARE season for Garrett Cooper owners in all formats.