Arrieta (thumb) is expected to start Friday's series opener against the Tigers, Jordan Bastian of MLB.com reports.

EDGE Analysis

Arrieta is throwing a bullpen session Wednesday, and his return to game action is imminent as long as he feels good afterward. Arrieta recorded a 4.31 ERA and 28:12 K:BB in 31.1 innings before he went on the injured list with a right thumb abrasion.