Thomas Francis Wilson (born April 15, 1959) is an American actor, writer, musician, painter, voice-over artist and stand-up comedian. He is best known for playing Biff Tannen (and his grandson Griff Tannen and great-grandfather Buford "Mad Dog" Tannen) in the Back to the Future trilogy and Coach Ben Fredricks on NBC's Freaks and Geeks. Description above from the Wikipedia article Thomas F. Wilso...