What Are the NFL Overtime Rules? And Why Are People Upset by Them?
Game Time! How Long is a Game of American Football? — The Sporting Blog
5 takeaways from Texas Tech's win over Oklahoma: Red Raiders walk it off after a shootout
NFL overtime rules: A timeline of every failed NFL team proposal to change OT format since 2010
How Long Does An American Football Game Last?
OT7 why is Overtime launching a new seven-on-seven football league? - SportsPro
Army tops Navy in first overtime game in history of rivalry - Los Angeles Times
Hollingsworth's Field Goal Lifts Eagles Past Wildcats in Overtime - Hinds Community College Athletics
NFL season: A glossary of terms and football jargon you'll need to fit in
Titans Fall 20-17 to the Chiefs in Overtime
What is the XFL? Explaining the teams, players to watch, rules and more – NBC Sports Chicago
How do NFL overtime rules work in the Super Bowl? - The San Diego Union-Tribune
Controversy over NFL overtime rules: Should they be changed? - AmadorValleyToday
Teams may choose to kick off in overtime if a possession is guaranteed - NBC Sports
American Football 101: How To Play the Game.