American football rules - Wikipedia
Defensive Pass Interference
How the NFL is manipulating games in 2020 - Fewer holding calls, faster games and way more offense - ESPN
Big 10 referee explains why pass interference call was waved off
NFL coaches, players brace for new pass interference rule
Our defense vs. their offense: Los Angeles Chargers - Canal Street Chronicles
WSU Cougars' offense gets plenty of attention, but the defense built foundation
Analyzing Defensive Pass Interference Fouls in the NFL and NCAA
Football Defensive Pass Interference Penalty
Richard Sherman wants pass interference to be 15-yard penalty for offense and defense - NBC Sports
Defensive Pass Interference NFL Football Operations