It's not just the Super Bowl that has Roman numerals.

[sox83cubs84]

Thanks to an NFL rule change regarding a player's generational identifier (hat tip to Paul Lukas of Uni Watch), Robert Griffin III will become the first player in NFL history to have a NOB with a Roman numeral (see photo of practice jersey below, courtesy of yardbarker.com)

Dave Miedema

[frikativ54]

That's interesting information, Dave. Thanks for sharing.