Shawn Kelley (back) could be activated from the disabled list on Monday. Kelley struck out two and walked one over two-thirds of an inning in a rehab appearance for Double-A Trenton Saturday. "I think you have to look at how the ball was coming out," Yankees manager Joe Girardi said Saturday. 'Was his velocity there? Was his slider sharp? Those sort of things. Sometimes it's more than just what the numbers say. Does he need another? We'll probably have a little better idea after today."