http://www.usatoday.com/sports/football/nfl/2008-02-21-competition-committee_N.htm
We can thank ted johnson as wellHe thinks it was gathered for the purposes of future games. Polian said videotape of sideline signals could be conceivably matched to game footage to decipher codes. Such a process might provide the type of advantage former Patriots linebacker Ted Johnson described during an interview with USA TODAY shortly after he retired in 2005. 'Every now and then I'd get a sheet, one hour before the game, with a list of audibles for our opponent,' Johnson said in November 2005. 'I don't know how, but they just showed up.'