Updated: February 3, 2019 7:29 AM Eastern Time

In the 1930s, NFL game telecasts were simply a constant feed of the field. Instant replay became commonplace in the mid-1960s, which helped fill the idle moments of the game. By the 1990s, some football broadcasts showed about 100 replays per game.

Deion Sanders is the only person in history to both hit an MLB home run and score an NFL touchdown in the same week. He's also the only person to play in the World Series and the Super Bowl.

NFL cheerleaders typically make $50–$75 a game. However, by the time they spend money on makeup, hair accessories, dance classes, etc., they end up losing money.

The NFL has an annual revenue of $9 billion, with a profit of 1 billion. MLB has an annual revenue of $7.2 billion, with a profit of $49 million.

The NFL consists of 32 teams, with an average team value of $1 billion. MLB has 30 teams, with an average team value of $523 million.