The D-backs reinstated infielder Jake Lamb (sprained left AC joint) from the 10-day disabled list and optioned infielder Christian Walker to Triple-A Reno.
Additionally, the D-backs reinstated right-hander Braden Shipley (right elbow inflammation) from the 10-day disabled list (retro to May 5) and optioned him to Reno.
Lamb, 27, was hitting .278 (5-for-18) with a double and five RBIs in four games with the D-backs this season before being placed on the disabled list on April 3. In three rehab games with Single-A Advanced Visalia, he went 2-for-11 (.182) with two doubles and two runs scored.