Shawn Kelley has been shut down after waking up with more stiffness in his back, according to the various reporters with the Yankees. Tests did come back clean, but they have halted his rehab and will proceed slowly.
Kelley was set to play catch this week, pitch in a minor league rehab game within the next few days, then rejoin the team either over the weekend or early next week. Back issues have a way of lingering, so this might be more than a few extra days. Adam Warren and Dellin Betances will remain David Robertson’s primary setup men for the time being.