According to a lawsuit obtained by TMZ, Andy Kallas claims was watching the boys perform at Schuba's Tavern in Chicago, when Wentz and his peeps beat him to a pulp for several minutes.

Kallas claims he suffered "serious injuries to his head, mouth and face." The way the lawsuit reads, the attack was totally unprovoked. But here's the deal. We're told Kallas was loud, obnoxious and heckling the band before the incident. - more on this story

Preview and Purchase Fall Out Boy CDs