Herget graduated from Jefferson High School in Tampa, Florida, where he was an outfielder with its varsity baseball team.

[7] He made his professional debut with the Billings Mustangs and spent all of 2015 there, posting a 3–0 record with a 3.20 ERA and 26 strikeouts over 25+1⁄3 innings.

[8] In 2017, he played for both the Pensacola Blue Wahoos and Louisville Bats, pitching to a combined 4–4 record with a 2.90 ERA and 72 strikeouts over 62 innings.

[19] On August 1, Texas selected his contact to the active roster, after opening the season with the Round Rock Express.

[22] After making 4 appearances with Salt Lake, going 0–1 with a 13.50 ERA and 5 strikeouts, the Angels selected Herget's contract on August 31, 2021.

[2] Herget made 29 appearances for the Angels in 2023, registering a 2–4 record and 4.66 ERA with 26 strikeouts across 29.0 innings pitched.

[25] On May 2, 2024, Herget was traded to the Atlanta Braves in exchange for cash considerations and assigned to the Triple-A Gwinnett Stripers.

[26] On May 25, Herget was recalled to the big-league club, making his Braves debut later that day, pitching a scoreless inning and recording two strikeouts against the Pittsburgh Pirates.

[32] Herget's unconventional sidearm delivery and high spin rate have generated a curveball and sinker which both have effective horizontal movement.