PHOENIX - Following Tuesday night's 5-4 loss to the Pirates, the D-backs placed Geoff Blum on the 15-day disabled list. The veteran pulled a side muscle during batting practice.
Gibson said the club will promote outfielder A.J. Pollock from Triple-A Reno to take his place on the roster.
Through 12 games with the Aces this season, the 24-year-old is batting .340 with six runs scored and five RBIs.
Pollock hit .315 in 54 at-bats with the D-backs during Spring Training.
In limited work this season, Blum had one hit in 11 at-bats.