From Wikipedia, the free encyclopedia Thomas Francis Duffy (born November 9, 1955) is a versatile American character actor, writer, musician, and athlete. He is best known for playing hippie Paleontologist Dr. Robert Burke in The Lost World: Jurassic Park and as Sam Moxon, the football loving dad in Varsity Blues. Description above from the Wikipedia article Thomas F. Duffy, licensed under CC-BY-SA, full list of contributors on Wikipedia.