One thing that distinguishes most team sports is that the game is suddenly played differently at the end. Often, this adds to the fascination, too. Nothing, for example, gets a rise out of me like when the hockey goalie skates off the ice with a minute or so to go, his team down a goal, leaving an open net.
In championship soccer, tie games go to a shoot-out, which is totally alien with all that came before. Neat stuff.
In football, the team ahead suddenly goes into a prevent defense –– or "PREE-vent DEE-fense," as we pigskinners say –– even though playing an entirely different way the rest of the game is why it got ahead in the first place.
In baseball, the strategy may not change, but the personnel does. All kinds of new pitchers and pinch-hitters appear.