In the early days of football, the referees wore white shirts with bowties. But often, so did the players. (White shirts, not the bowties.) In a game in 1920, a quarterback passed the ball to a referee, Lloyd Olds, thinking he was a running back. Olds went to friend who ran a sport shop and asked him to make a shirt that would make the referee unmistakable on the gridiron. Olds never caught another pass but he made referees unmistakably visual.
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