The writer/director is the silent card player in the black jacket at the back in the scene where the $50,000 bet is made on the outcome of the game.
The producer is the guy in the blue shirt leading the group who offer to play a scratch match against Frank and the others.
The script supervisor appears face down in Charlie's bed, just before the Japan-Australia game; then later asks Charlie: "What are you smiling about?"
The 1st assistant director is the lady walking the dog about 30 minutes into the movie.