If a game is tied after regulation an additional 20 minutes of 5 on 5 sudden death overtime will be added.

If the game is tied after four quarters have been played, the teams begin sudden death overtime; the team that scores first wins the game.

In sudden death overtime, the referee inadvertently resumed the game during a television timeout.

Tied after 60 minutes of play, it became the first NFL game to go into sudden death overtime.

The 31-yard kick was good, giving the Eagles a dramatic 20-17 victory in sudden death overtime.

Then, with one minute left in the game, Rick Tocchet scored to force sudden death overtime.

A frantic final minutes produced no further scoring, and the game went into sudden death overtime.

He then kicked a game-winning field goal in sudden death overtime.

Game 2 was tied 2-2 after regulation time, which was followed by a 10-minute, non-sudden death overtime.

In 1974, the NFL adopted sudden death overtime for regular season games.