Comedy Videos Letterman Stand-Up Comedy Spotlight: Greg Fitzsimmons Watch comedian/radio host Greg Fitzsimmons’ performance on “Late Show with David Letterman.” ByStage Time Published May 13, 2011 Flipboard Reddit Pinterest Whatsapp Whatsapp Email Watch comedian/radio host Greg Fitzsimmons’ performance on Late Show with David Letterman. In this article:Comedy Videos, Greg Fitzsimmons, headliners, performing stand-up comedy, veteran comedians Advertisement Flipboard Reddit Pinterest Whatsapp Whatsapp Email Advertisement