I think Varvaro is taking Workman's spot.
Workman has been really good in the post season, 7 scoreless innings there, which I think makes us all think of him (as fans) in a better light than we probably should. Otherwise he has been fairly crappy.
Given the overall balanced way that this team seems to be approaching their pitching, Varvaro seems like a better fit for the bullpen to me based on track record and potential situations (given that we don't have a shut down LHP like Miller at the moment, and he deals well to lefties). Workman is getting a bit old to really think of as a prospect, but perhaps some time in Pawtucket in a regular rotational slot is still the best thing for him to build value or prepare for an inevitable opening in the ML rotation due to injury/shittyness.
Again, very happy with Ben's ability to construct a roster as an organism this year.