American football rules
Super Bowl LI was the first Super Bowl to go into overtime with a 28-all tie between the Atlanta Falcons and New England Patriots, which the Patriots eventually won with James White scoring a touchdown on the Patriots' first drive.
Super Bowl VI
Super Bowl VI was an American football game between the National Football Conference (NFC) champion Dallas Cowboys and the American Football Conference (AFC) champion Miami Dolphins to decide the National Football League (NFL) champion for the 1971 season. The Cowboys defeated the Dolphins by the score of 24–3, to win their first Super Bowl. The game was played on January 16, 1972, at Tulane Stadium in New Orleans, Louisiana, the second time the Super Bowl was played in that city. Despite the southerly location, it was unseasonably cold at the time, with the kickoff air temperature of making this the coldest Super Bowl ever played.