Brendan Ryan will not be ready for Opening Day after an MRI revealed that something was pushing on a nerve in his back. Ryan has dealt with oblique and back issues this spring, ailments that the Yankees have insisted are not related. Regardless, he can't do much without feeling discomfort, so he's not going to be game-ready for a while. Eduardo Nu¤ez will serve as Derek Jeter's primary backup at shortstop while Ryan is on the shelf.