I agree with your there. The sox had no contingency plans when they dealt Arroyo. If they had him last yr, then things might have been different. Instead of passing on Abreu, they may have acquired him and his presence in the yankee lineup was the major catalyst for that 5 game drubbing.
I dont like dealing pitching, I really dont. UNLESS, you are dealing a defective product and you have significant depth. Last season, the sox entered the yr with a rotation of
Schilling, Clement, Wells, Wakefield, and Beckett. 3 of those guys had recent injury histories at the time. Their contingency plan was a rookie by the name of Lester, with no other minor league impact player even close to available. You have to have more than just that.