Marc David Maron is an American stand-up comedian, podcaster, writer and actor. In the 1990s and 2000s, Maron was a frequent guest on the Late Show with David Letterman and appeared more than forty times on Late Night with Conan O'Brien, more than any other stand-up comedian. He hosted Comedy Central's Short Attention Span Theater from 1993 to 1994, replacing Jon Stewart. He was also a regular guest on Tough Crowd with Colin Quinn and hosted the short-lived 2002 American version of the British game show Never Mind the Buzzcocks on VH1. He was a regular on the left-wing radio network Air America from 2004 to 2009, hosting The Marc Maron Show and co-hosting Morning Sedition and Breakroom Live.