The Rockies expect Chatwood , 26 , to return to the rotation .
The Rockies are keeping a close eye , since Chatwood had Tommy John surgery as a teenager and not much is known about arms with multiple surgeries so far apart .
The Rockies expect Chatwood , 26 , to return to the rotation but are keeping a close eye , since Chatwood had Tommy John surgery as a teenager and not much is known about arms with multiple surgeries so far apart .