Brian Posehn (born July 6, 1966) is an American actor and comedian, known for his roles as mail clerk Kevin Liotta on NBC's Just Shoot Me!, as a cast member of HBO's Mr. Show, and as Brian Spukowski on Comedy Central's The Sarah Silverman Program. Biography Career Posehn has had mainly small roles in TV shows, including the voice of Jim in Mission Hill and Del Swanson in 3 South. He appeared on an episode of Seinfeld, "The Burning", playing a patient, when Kramer "was given" gonorrhea. Brian's character was to "act out" how a surgeon left a sponge in him, to a cast of medical students. In addition, he has done the voice of Gibbons, a tiny man, on some episodes of Tom Goes to the Mayor. In another Adult Swim production, Aqua Teen Hunger Force, he voiced the Wisdom Cube in the episode "The Cubing". Posehn portrayed a convenience store clerk in Dumb and Dumberer