Mystery Train is a musical collaboration between Sonny Derin (harp/vocals) and Jimi Delloiaco (guitar/vocals).
Delloiaco played with surf band Point Break and roots rockers Flash Back. He also played country music with Border Crossing, before forming the first version of Mystery Train in 1995. In 2001, he met Sonny Derin and expanded Mystery Train to include him.
Derin moved to San Diego in 1993, playing with Ronnie Nightrain Lane and the Texas Twisters and then with the San Diego King Bees. After 14 years with Mystery Train, Derin played his final show with the band in December 2009, before moving to Colorado.