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.
2001 St. Louis Rams season
The Rams returned to the Super Bowl for a second time after shockingly winning their first title 2 years before, but this time against the 11-5 New England Patriots, led by Bill Belichick and sophomore quarterback Tom Brady. The Rams lost 17–20 and were expected by many to win their 2nd Super Bowl title. This was the Rams' last Super Bowl appearance until 2019, when they defeated the Saints 26–23 in the NFC Championship game.