Mike Davis picking off Brian Sipe in 1980
Red Right 88
Brian Sipe forced a pass to tight end Ozzie Newsome which was intercepted in the end zone by Raiders safety Mike Davis, who had cut in front of Newsome's square-out pass route, putting an end to the Browns' season. Oakland subsequently advanced to the AFC conference championship, where they defeated the San Diego Chargers and went on to win Super Bowl XV against the Philadelphia Eagles.
https://www.youtube.com/watch?v=j0LVUl1wYo4
No. 2, Jack Squirek in the Super Bowl against Washington Redskins
No. 3, Willie Brown Superbowl against Minnesota Vikings
The Browns had 15 yards to go with a minute or so remaining, down by 2. I thought it was over, they were going to run 2x and then kick a chip shot field goal with little time remaining. This was the first wild card team to win the super bowl. Without this happening, there would have been no super bowl.