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As the NFL's regular season kicks off, here's a look at its 20 richest teams.
The National Football League continues to be the lucrative sports league in the world. Its 32 teams are worth, on average, $1.17 billion -- 5 percent more than last year. With the regular season getting underway, here's a look at the NFL's 20 richest teams:
What's behind the tradition of turning our clocks ahead each spring?