Diamondbacks' Blake Walston: Comes off IL, optioned to Reno

The Diamondbacks reinstated Walston (elbow) from the 15-day injured list Monday and optioned him to Triple-A Reno.

With Eduardo Rodriguez and Merrill Kelly both recently returning from the IL, the Diamondbacks don't have an open spot on the rotation for Walston. For now, Walston will head down to Triple-A, but the 23-year-old southpaw should eventually make his way back to the big club, possibly as a multi-inning option out of the bullpen if the rotation isn't impacted by injury. Prior to landing on the IL on June 6 due to left elbow inflammation, Walston registered a 2.84 ERA and 1.42 WHIP across 12.2 innings in three major-league appearances (two starts).