American

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See also:

Recreation: Collecting: Sports: Football (0)
Shopping: Entertainment: Tickets: Sports: Football (12)
Sports: Football: Arena and Indoor (92)
Sports: Football: Canadian (118)

PigskinHeaven.com :

- NFL, College, and fantasy football forums.

Quarterback Passer Rating Calculator :

- Rates quarterbacks by attempts, completions, passing yards, touchdowns, and interceptions. NFL, NCAA, and Arena Football League calculations available.

SearchQB.com :

- Customized search engine focused on football.

Wikipedia: American football :

- Encyclopedia article covering the history of the sport, its popularity, rules, basic strategy, and physicality.