Signage: Big Machine Records has signed Backbeat Troubadours, the duo consisting of Mark Collie and Billy Bob Thornton. Their debut song, “True American Racer (500 Miles) (featuring Slash),” is featured in the documentary Bobby Rahal: True American Racer, which debuts tonight (5/8) on FS1. The documentary's soundtrack, set for release in July, also includes songs from Riley Green, Brothers Osborne, The Jack Wharff Band, Mackenzie Carpenter, Greylan James, Marfa, Cole Goodwin, Danielle Bradbery and Rascal Flatts.