Ronald Guttman has joined the cast of the indie thriller “Pawn,” starring Michael Chiklis.He joins a cast that includes Ray Liotta, Forest Whitaker and Common. David Armstrong is helming the pic. Story revolves around a small-time robbery that spirals into a tense hostage situation after three gunmen hold up a diner that’s a front for the mob. Guttman will play the mystery man in the hostage situation gone wrong. Guttman, who is repped by Buchwald/Fortitude, can next be seen in Gela Babluani’s “13”alongside Jason Statham and Mickey Rourke.