Roman numerals are a numeral system which was used in Ancient Rome. It uses letters instead of numbers to represent values. You may have seen Roman numerals on clocks and on TV or film credits.

The NFL assigns Roman numerals to each the edition of the game ... There is a helpful chart that can help fans keep track of the numbers of 1 through 99. It can also help as a cheat sheet anytime ...

Unlike the other major American sports leagues, the NFL uses Roman numerals to denote its title decider — the Super Bowl.