Alfredo Aceves thinks he will be out two or three days because of his stiff back.
The Yankees' initial plan is to wait before bringing up anyone. If they end up using their bullpen a lot Sunday night, they will likely make a move in Detroit to protect themselves against Sergio Mitre and Javier Vazquez not giving them innings.
Aceves has had the back stiffness before and didn't seem overly concerned it would be a big deal. Aceves left Saturday's blowout in the sixth because of the backache.