Glaser has provided voice work for the TV series TV Funhouse, Stroker and Hoop, Freak Show, Cheap Seats: Without Ron Parker, and more. Glaser was a writer for the TV series Late Night with Conan O’Brien from 1998 to 2003. He has also written for the TV series The Dana Carvey Show, The Jenny McCarthy Show, The Keenan Ivory Wayans Show, Freakshow, Human Giant, Pretend Time, Delocated, Inside Amy Schumer, and Neon Joe, Werewolf Hunter. Glaser created the TV series Delocated and Neon Joe, Werewolf Hunter. He has won three Writers Guild of America awards for Late Night with Conan O’Brien and has been nominated for five Primetime Emmy Awards for the show and one more for Inside Amy Schumer.