The Super Bowl uses Roman numerals to identify each version of the game, which can confuse viewers trying to read the old numerical system.

The NFL started using Roman numerals for Super Bowl V (ahem, “Super Bowl 5″) in 1971 and then went back and renamed the previous championship games as Super Bowls I, II, III and IV.

This year's version of the NFL's biggest game is Super Bowl LIX — or Super Bowl 59, if you're not well versed in Roman numerals. Unlike the other major American sports leagues, the NFL uses ...

This year's version of the NFL's biggest game is Super Bowl LIX — or Super Bowl 59, if you're not well versed in Roman numerals. Unlike the other major American sports leagues, the NFL uses ...