How much of the championship game played in the movie is accurate?

Not much. In real life, Coach Wood ordered a stall twice during the final quarter. Milan's star player, Bobby Plump, literally held on to the ball, without moving, for 4 minutes, 13 seconds, before taking a shot (and missing) with a few minutes still left on the clock. On Milan's next possession, Plump again stood stationary with the ball as the clock ticked down from 1:18 to 0:18. In 1987, Milan star Bobby Plump told the Saturday Evening Post, "The final 18 seconds were the only thing factual in the movie about the Milan-Central game. From the time the ball was in bounds after the final timeout, the movie was accurate." This includes Plumps thrilling game-winning shot.