I remember posters in here arguing about pitchers being injured more as starters.
I also remember shortly after listening to a soxprospects.com podcast where they were talking about a study into this. I should probably look this up to verify that I'm not mixing it up and it's the other way around but I believe there's no relationship between starting and relieving for elbow injuries BUT starting pitchers tend to sustain a much greater number of shoulder injuries than relief pitchers.
I think Tanners low pitch counts will allow him to pitch deeper in the season BUT he's at his career high right now. You can't just shake that off, and if this team does make it into the playoffs that will be even more stress on his elbow. Which seemingly is fine.....but we should hope it stays that way.
I don't know how you can even think about doing this from a roster construction point of view, but from a physiological point of view, it almost makes sense to shut down every pitcher for 2 weeks in the middle of every season. You won't see that, but in a hypothetical alternate universe I bet that reduces a lot of elbow injuries.