Factual error: In the opening credits, Lavitas comes off the football field in a #12 football jersey, but later references that he and the rest of the Green Team are an offensive line. No matter what level of football (NCAA or NFL), an O-Lineman wouldn't wear #12.
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Suggested correction: Practice jerseys don't necessarily have to match a game jersey, mine didn't.
Factual error: When the Peanuts gang got to Victoria station, Travel Center is spelled the American way. Since it's England it should be "centre" (00:24:55)