Hey, remember that punch-up Pete Wentz got into last summer at a SPIN magazine party in Chicago? You don’t? Why, we were all over it back then.

Anyway, now the dude allegedly on the receiving end of Wentz’s fury — a gentleman named Andy Kallas — has filed suit against both the Fall Out Boy bassist and Chicago rock-spot Schuba’s Tavern (where the beatdown took place), seeking unspecified damages. In the suit, Kallas alleges that he suffered “serious injuries to his head, mouth, and face” after being attacked by Wentz and as many as ten other individuals, and that said attack was totally unprovoked.

When we first covered the story back in June, one Schuba’s patron said that Kallas was “calling Pete a sell-out, asking him ‘Where’s [girlfriend] Ashlee [Simpson]?’ and making fun of his hoodie.” Wentz himself said that he only punched Kallas because he grabbed him, and that he was only acting in self-defense.

When contacted for comment on the lawsuit by MTV News today, Wentz would only offer a “no comment.”