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Fifteen illegal contact flags thrown in Week 1 of NFL preseason after 36 thrown all of last regular season - ESPN
How a new rulebook will affect Massachusetts high school football - The Boston Globe
Inside the often-chaotic NFL challenge process - ESPN
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Evolution of the NFL Rules
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Patrick Mahomes, Chiefs outlast Vikings 27-20; Travis Kelce catches TD pass after hurting ankle
Plainfield School Superintendent Demands Immediate Action Regarding Football Game
J.J. McCarthy has a hand in 3 touchdowns in No. 2 Wolverines' 45-7 rout of Nebraska
Football Gameday Information – UK Athletics
NFL responds to Cam Newton ref criticism, missed calls - Sports Illustrated