The Jacksonville Roar break down the basics of NFL
27 September 2013 Last updated at 06:27 BST
Newsbeat has been to meet The Roar, the official cheerleaders of the Jacksonville Jaguars.
The NFL returns to the UK this weekend for the first of two regular season games.
On Sunday 29 September the Pittsburgh Steelers take on Minnesota Vikings.
The Jacksonville Jaguars will play the San Francisco 49ers on 27 October.
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