Which American stand-up comedian starred in  It's Only a Theory
Reginald D. Hunter Reginald Darnell Hunter (born 26 March 1969) is an American stand-up comedian based in the United Kingdom.
Mario Joyner Mario Joyner (born October 3, 1961) is an American stand-up comedian best known as the host of MTV's "Half Hour Comedy Hour" from 1988–1992. He is a longtime friend and collaborator of comedians Chris Rock and Jerry Seinfeld. He appeared regularly on "The Chris Rock Show" and "Everybody Hates Chris". He also guest starred in the "Seinfeld" episodes "The Engagement" and "The Puerto Rican Day," playing two different characters, and voiced the character Jackson in the film "Bee Movie". He has opened on national tours for Chris Rock (during his "No Apologies" tour) and for Jerry Seinfeld.