After George enters the game and the team is penalized for Delay of Game, the referee is shown winding the clock. The clock is not started after a Delay penalty.
In the flashbacks when Plimpton pitches against the American and National League All-Stars, Yankee players are shown wearing both home and road jerseys.
In the knife throwing sequence, the knives can be seen coming out of the backboard as opposed to them actually being thrown at Plimpton.
(at around 7 mins) After Kate "tackles" George, he says, "It's touch football... touch - two hands below the waist." However, on the next play, George throws a short pass to Ann over the middle, and she is tackled by a woman who encircles her with two hands way above the waist.