Walston (elbow) struck out five and allowed two hits and no walks over 3.2 innings in a rehab start for Triple-A Reno on Sunday.

EDGE Analysis

According to Jesse Friedman of GoPHNX.com, manager Torey Lovullo said July 26 that the Diamondbacks were undecided on what Walston's role might look like upon the left-hander's return from the 15-day injured list, but Walston's usage Sunday implies that he'll be built back up as a starter. With Eduardo Rodriguez and Merrill Kelly both beating him back from the IL, the Diamondbacks don't have a rotation spot available for Walston at the moment, though the complexion of Arizona's pitching staff could change by the time Walston is ready for activation. Walston posted a 2.84 ERA and 11:9 K:BB across 12.2 innings in three outings (two starts) for Arizona before landing on the IL on June 6 with a left elbow strain.