Thomas Francis Wilson Jr. (born April 15, 1959) is an American actor, comedian, musician, podcaster and YouTuber. He is best known for playing Biff Tannen, Griff Tannen, and Buford "Mad Dog" Tannen in the Back to the Future film trilogy (1985–1990). He also played coach Ben Fredricks in the comedy series Freaks and Geeks (1999–2000) and voices...