Heidorn got married and left Uncle Tupelo after the recording of their third album, March 16–20, 1992. After the breakup of Uncle Tupelo, Heidorn was reactivated by Farrar and joined the first version of Son Volt, but was not involved in the reformation of the band in 2005 and is no longer active as a professional musician.
References
Crone, Thomas (August 26 – September 1, 1992). "The Men From Uncle – Belleville's Uncle Tupelo goes Buck naked". Riverfront Times.