The Angels reinstated Herget (shoulder) from the 15-day injured list Sunday.
To clear room for Herget on the 26-man active roster, the Halos optioned Chase Silseth to Triple-A Salt Lake. Herget was sidelined for the past five and a half weeks due to right shoulder tendinitis, but he pitched effectively over a recent three-appearance rehab assignment for Double-A Rocket City, covering four innings while allowing two earned runs on two hits and two walks and striking out four.