The Sox have had a surfeit of days off over the last 2 weeks--one before, one during, and one after the West Coast trip. Does that count for nothing?
These days every time Jansen pitches he looks rusty--because he is.
And please name me a team whose rotation averages 6 freaking innings per start.
All that said, the Sox play four vs the Rays in the next 3 days, so all that relief pitching tonight, last night, and the night before has probably taken a toll.
Nevertheless, when the Sox play two on Saturday my candidate to start the other game is Pivetta, who threw 54 pitches last Sunday (6 days back from this Saturday) 13 yesterday and 15 tonight.
If Sale's shoulder puts him on the IL, Pivetta is the obvious choice to rejoin the rotation.