Do you think the NFL overtime rule is flawed in the sense that the team that loses the toss never gets a chance to counterattack? - Quora
Comparison of American and Canadian football - Wikipedia
NFL Can Learn From the CFL's Overtime Rules - 13th Man Sports
NFL game management cheat sheet: Guide to fourth downs and 2-point conversions - ESPN
Why does the NFL even have a clock in playoff overtime? They will play until someone wins. - Quora
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The Top 10 Differences Between the NFL and the CFL - HowTheyPlay