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The ball used in the first game was very round like a soccer ball and very hard to hold throw http://www.popularmechanics.com/adventure/sports/a240/1283226/
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The ball was now changed to something rugby like, it was thick and round like a watermelon (exact date was unkown) http://www.popularmechanics.com/adventure/sports/a240/1283226/
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The ball was changed to a bigger version of the ball we have today both longer and thicker. (exact date was unknown) http://www.popularmechanics.com/adventure/sports/a240/1283226/
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"The Duke" is what people called the football of the National Football League and the later on became the football of american football league for 30 years. (exact date is unknown)
http://www.popularmechanics.com/adventure/sports/a240/1283226/ -
This ball is white and the reason for that is so for night games the ball is easier to see, it was created by wilson and had a bunch of good upgrades.(exact date unknown)
http://www.popularmechanics.com/adventure/sports/a240/1283226/ -
This football is this Spalding and it helped the passing game having more cushion on the ball not making it as Hard. (exact date unknown)
http://www.profootballhof.com/photos/gallery/the-evolution-of-the-football/ -
This one is named Paul Tagliabue because he was the commissioner of the league at the time.(exact date unknown)
http://www.popularmechanics.com/adventure/sports/a240/1283226/ -
It is Roger Goodell's football as he is now the commissioner of the league and they are made exactly as he wants them and very efficient on holding air now. (exact date unknown)
http://www.popularmechanics.com/adventure/sports/a240/1283226/
