U.P.O. was an American rock band from Los Angeles, formed in 1997. The band's line-up originally included Shawn Albro (lead vocals), Chris Weber (guitar), Ben Shirley (bass) and Tommy Holt (drums). Shirley and Holt left and were replaced by Zoltan Bathory (now in Five Finger Death Punch) and Philippe Mathys shortly before the band's breakup in 2004. U.P.O. released two studio albums – No Pleasantries (2000) and The Heavy (2004).