Self-professed nerd and heavy metal addict, comedian, writer, and actor Brian Posehn became a cult favorite courtesy of the HBO series Mr. Show. Posehn had been a longtime friend of David Cross and the two had worked together in the stage show Three Goofballs, which eventually morphed into Mr. Show. Posehn wrote and made appearances on the series, which led to a regular gig on NBC's Just Shoot Me, where he played mailroom clerk Kevin Liotta, Ray Liotta's fictional cousin. After doing voice work on the animated series Mission Hill and 3 South, he became a frequent contributor t...