In 1986, Mansfield was an initial member of Bruce Hornsby and the Range,[8] including playing the title instrument on the hit "Mandolin Rain". However, he left the Range before their first tour.
Mansfield composed the music for the 1980 film Heaven's Gate – he appeared in the movie, playing the fiddle on roller skates – and has since gone on to write scores for a number of other films, including others directed by Heaven's Gate'sMichael Cimino.[9] Mansfield cobbled together the soundtrack album for Songcatcher.[10] He also composed the music for the soundtrack to The Ballad of Little Jo (1993), a movie written and directed by Maggie Greenwald, whom he married in 1994.[11] Together they adopted two children. Maisie Mansfield-Greenwald (1997) and Lulu Mansfield-Greenwald (2000). He also composed the score with Van Dyke Parks for Walter Hill's Broken Trail (2006), and they were nominated for a Primetime Emmy Award for Outstanding Music Composition for a Miniseries, Movie or a Special (Original Dramatic Score).[12]