Jeff Rosenthal has been performing improvisational comedy on and off since 1995. His large size and substantial hairiness mean that his physical presence is memorable even when his improv isn't. Jeff also performs music at clubs and conferences, and provides musical accompaniment to comedy shows. Early on in Jeff's showbiz career, he was told, "Don't give up your day job!". He has taken that advice seriously, becoming a professor of statistics at the University of Toronto.