The Angels released Walker on Saturday.
Walker failed to receive a promotion to the majors over the course of two minor-league deals with the Angels, the first of which he signed in late May. The veteran right-hander will likely have to settle for another minor-league deal with a new organization after posting a 3.86 ERA, 1.38 WHIP and 12:7 K:BB in 21 innings over five starts between the rookie-level Arizona Complex League and Triple-A Salt Lake during his time with the Angels.