The game itself was an upset - the other, nefarious team was highly favored despite a late-season meltdown. But the rivalry between both teams (and hence the cities for whom they play, even though all members of both teams are highly compensated and generally do not originate from their respective towns) is long and bitter. It was the sort of triumph that indicates that the sports team owned by the man in my town of origin is true to the virtues prized by my town, and that their triumph over the more high-flying, fancy team proves that the simple, humble virtues of hard work, heart, loyalty and determination are eventually invincible. What is more, the team that is owned by the multi-millionaire who happens to base his sports corporation in my home town where I no longer dwell now advances to the playoffs, and has a shot at the championship as a result of their victory. They will have to play many teams owned by multi-millionaires from other cities, but none so hated and reviled as this most-recently-defeated team, and therefore any victory after this one is simply a "bonus".
Thus, I bask in borrowed glory! The team that is owned by the multi-millionaire who happens to base his sports corporation in my home town where I no longer dwell has won! Hooray for he team that is owned by the multi-millionaire who happens to base his sports corporation in my home town where I no longer dwell! Boo to the sports team from another state with a dissimilar climate and culture that is an examplar of many flaws, the greatest of which is pride! Pride goeth before the fall!
(Yay Eagles! Boo Dallas!)