Not all teams can afford to have 5 aces on their staff. He would be what he is, a 5th starter. He'd definitely be an upgrade over Pauley, Alvarez, Gabbard, and Snyder who is showing he doesnt have the stamina to be going more than 4 innings
Like I said, im not expecting shutouts left & right. He is an innings eater, which Im sure the Sox have on their checklists. Theo is also going for these low-risk guys (though Lidle stands out as best of them) because he stands by his decision he doesnt want to sell the farm for a win-now deal.