As with so many of the chess sets in my collection, I saw this American Football set on eBay, for not very much at all.
Now there is such a thing as 'football chess'! The aim of 'football chess' is not to capture the king, but to get a ball into the goal or over the goal line. The now out-of-print Encyclopedia of Chess Variants actually lists five different versions, one of which uses a standard 8 x 8 board with the standard line-up of pieces. The difference with FIDE chess is just that there is a ball, which must be 'kicked' over the goal line, and each piece 'kicks' the ball the same way it moves.
So I decided to just add a small ball to this set to turn it into (American) football chess.
Board is the usual fold-out cardboard, depicting an American football field with two end zones. The 'Rivalry' refers to the Super Bowl where the champions of the National Football Conference and the American Football Conference play against each other. Hence the 'A' and 'N' in the two end zones.