One of the bands that collaborated in 2000 with American Underdog was formed earlier than the Jon Spencer Blues Explosion.
Unwritten Law is an American rock band formed in 1990 in Poway, California They have released seven full-length studio albums and have toured internationally, including performances on the Warped Tour. 
The Jon Spencer Blues Explosion is an American alternative rock trio, formed in 1991 and based in New York City, New York. 
 This album includes collaborations with Daddy X, The Dirtball, Johnny Richter, Scott Russo of Unwritten Law, Jared of Hed PE, and John E. Necro. 
