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Breaking down the NFL's 6 new rules for 2021 season - Pride Of Detroit
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Impact of the COVID-19 pandemic on gridiron football - Wikipedia
West Coast teams trying to get NFL rule passed to cut down on early kickoff times
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NFL Fans Crush the League Over the Baffling New Kickoff Rule - Sports Illustrated
NFL preseason could be a good test of how teams approach the league's new kickoff rule
2010 Army Football Guide by Army West Point Athletics - Issuu
2020-21 Eagle Football Fact Book (updated Feb. 18, 2021) by Eastern Washington University - Issuu