Agreed. Sale only threw around 150 innings this year. Thus, we can't say he is wearing down as the season has gone on. Instead, an arm/shoulder issue is more likely the culprit.
Well, it could still be viewed as "breaking down," since both DL stints happened in the second half of the season.
I'm not sure if this whole "mechanics" argument is just a ploy to take the focus off an actual injury, but there is a chance that once he fixes the mechanics issue he incurred after missing time (not uncommon), he may prove there really is no major arm issue. We may know more next game.
Sale has a violent delivery. I don't think anyone would be surprised that that kind of delivery would eventually catch up to him.
Can't argue with this.