Actress Kate Mara's family is heavily involved in the NFL. Her dad's family owns the New York Giants and her mother's family owns the Pittsburgh Steelers.
After the Giants won the Super Bowl her family let one of her English ex-boyfriends hold the Lombardi Trophy. He dropped it and caught it using his foot, denting the trophy.
And that's how the New York Giants curse was born. They should have known soccer players don't know how to use their hands.