Three
Years ago, I was told each NFL home team must have 24 footballs on hand for the game.
24
24
24. However, they usually provide 8 to 12.
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Unfortunately, no. It is the home team's responsibility to have 36 footballs, 24 for indoor games, ready to be checked by the head referee, with a pressure gauge, two hours prior to the game. Those balls must meet the NFL's requirements or they will not be used. Also, twelve new footballs, sealed in a special box and shipped by the manufacturer, will be opened in the officials' locker room two hours prior to the starting time of the game. These balls are to be specially marked with the letter "k" and used exclusively for the kicking game. Does that help?
U.S.A
Yes, it is.
There are nine home games and 1 home game presseason.
The Host Team and the visiting team each provides 12 balls per game. The balls are inspected before the game to ensure that they meet specifications. Of course each team also has many "non-game" practice balls on hand.
The ball is called the Wilson F1005 NCAA FootballYou can buy them here:http://www.hitrunscore.com/f1005-wilson-football.html
4 1/2 if the home team is ahead, 5 if the home team is behind.