Ugh. How is this a bad thing? We have a 12 game lead and a relief pitcher who's had injuries in the past. We have a manager is concerned with not burning guys' arms out.
Even an MCL tear he's done until the playoffs at least. wouldn't an mcl tear put him out for like a year too? I think it depends on the grade - cutler had that one and played football on it for a few series.
Closers with the resume of Chapman don't get used in setup situations. That's just the way it is, no matter how progressive the manager is. At least it seems that way in the regular season. I bet he'd have used Arnoldis there if this waste WS.