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Do rivalries actually exist in this day and age in the National Football League in which longtime opponents can become teammates in the blink of an eye?

You bet they do.

Face it—the game of football is a little more fun when you realize that teams and/or a few players really don’t like each other. The game is made even more interesting when the head coaches are not too fond of one another.

So here’s a look at a dozen rivalries, between both teams and individuals, that pique our interest, with an unusual twist or two along the way. As usual, we’re not afraid to bring up an unorthodox view. But lest you worry, there’s plenty of respect paid to tradition here.

From the historic to the current, we’ll touch on storied series and recent events in this piece. In any case, it’s a fun look at one of the aspects of the game that we enjoy so much.