Herget will have his contract purchased by the Rangers, Jeff Wilson of the Fort Worth Star-Telegram reports.
Jose Leclerc (shoulder) was placed on the 45-day injured list Thursday, opening up a spot on the big-league roster for Herget. The right-hander made five appearances for the Reds in 2019, allowing three runs on eight hits and three walks across 6.1 innings. He should fill a low-leverage relief role during his time with the big club.