NFL approves overtime rule change for postseason
With 2011 playoffs, overtime rules change - NBC Sports
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Explaining NFL playoff overtime rules, changes made and how they differ from regular season - The Athletic
Overtime rules for the NFL playoffs – Football Zebras
NFL playoff overtime rules: Explaining how the new OT format works in 2023 postseason
What would happen if an NFL playoff game went into many overtime periods without ever ending? - Quora
Double Overtimes and the NFL Playoff Overtime Rules – Quirky Research
NFL changes football playoff overtime rule