Diamondbacks' Merrill Kelly: Ready for another bullpen session

Kelly (shoulder) is set to throw a bullpen session Friday, Alex Weiner of ArizonaSports.com reports.

Kelly completed a bullpen session Tuesday, the first time he's thrown from the mound since landing on the injured list in mid-April with a shoulder strain. He'll continue building up his workload before progressing to facing live batters and remains on track for a mid-August return.