The Angels optioned Herget to Triple-A Salt Lake on Sunday.
Herget was one of three relievers moved off the 26-man active roster as the Halos welcome a trio of fresh bullpen arms from the minors ahead of Sunday's series finale with the Twins. Over 12 appearances with the Angels this season, Herget has posted a 4.38 ERA, 1.46 WHIP and 9:4 K:BB in 12.1 innings.