Shawn Kelley threw 20 fastballs and snapped off five sliders in the bullpen Friday at Yankee Stadium, his first time on a mound since his back locked up following a May 6 outing against the Angels in Anaheim.

Kelley, who is on the Yankees' 15-day disabled list with a strained lumbar spine, said that he tested his back by throwing with some intensity, about what he normally would have done to prepare for coming into a game.

"Honestly, today was a big step," Kelley said. "If I wake up tomorrow and feel good, then I know that we can probably put a schedule in tact and set a goal."