I don't totally get this usage of late, but it could be explained in a few ways. The one I am leaning towards is that they see Swaggerty as an up/down defensive guy who comes off the bench and rarely plays, whereas they see CSN as having more upside as a regular starter. If this is the case, then it does make sense to max his playing time, because presumably if you decided to keep him, you would want him getting regular ABs and then that would possibly mean making other decisions like optioning Joe or the more radical jettisoning Choi in order to move Joe to more of a backup IF/1B role.
That might be the wrong read of the situation, but it's definitely the case that this front office has never seemed to think much of Swaggerty. When he got called up last year, I think he faced a couple of tough LHPs over a handful of games and that was pretty much it.
My guess at their assessment of him might speak to an accurate assessment, I really have no idea, but just from a tools perspective, I'd like to see Swaggerty get a little bit of run as the 3.5/4th OF on this team. CSN has really impressed but as I've said a few times I would want to see him go down to AAA and see if he can maintain the elite plate discipline while adding at least average pop. If he does that, then given the depth, he will easily force his way back onto the team by mid-May or so (and if my assessment guess is right, then cynically you could say that it's better to manipulate CSN's service to guarantee the 7th year of control).
