What was the highest-grossing sports movie from the 1970s?

There's nothing quite like a good sports movie — the beaten-down team, the unlikely hero, the winning shot.

The '70s gave us some of the all-time great sports movies, championing tropes that still influence film and TV today. Whether we're talking about a ragtag bunch of misfits who find that teamwork is the key to winning, or a young man learning that competitive cycling and becoming an adult have a lot of similarities.

But which sports movie from the 1970s made the most money?