In 2014, he split the season between the Single-A Peoria Chiefs and High-A Palm Beach Cardinals, pitching to a cumulative 8–3 record and 2.71 ERA with 94 strikeouts and 4 saves in 76.1 innings of work.

He spent 2015 with Palm Beach and the Double-A Springfield Cardinals, posting a 5–2 record and 2.64 ERA with 74 strikeouts and 7 saves in 42 appearances.

In 2017, Herget played for Springfield and Memphis, pitching to a 5–4 record and 3.97 ERA with 81 strikeouts and 5 saves in 81.2 innings of work.

After undergoing Tommy John surgery, Herget missed the majority of the 2019 season as a result, making only two rehab appearances with the Gulf Coast Cardinals.

[6] He started one game for the team, allowing one run on three hits in 7.0 innings pitched en route to the victory.

[7][8] Herget made 28 appearances (7 starts) for the Triple-A Columbus Clippers, posting a 7–5 record and 4.48 ERA with 85 strikeouts and 2 saves in 80+1⁄3 innings pitched.

[9] On April 12, 2022, Herget signed with the Charleston Dirty Birds of the Atlantic League of Professional Baseball.

[10] On April 19, the team announced that Herget would be their Opening Day starter against the Staten Island FerryHawks.

However, he was designated for assignment on August 23 and cleared waivers without appearing in a game, briefly becoming a phantom ballplayer.

Herget did not make the team out of spring training and was assigned to the Triple-A Louisville Bats to begin the 2023 season.

Herget was designated for assignment by Cincinnati on June 19, after Joey Votto was activated from the injured list.