There can be no more than 53 players on an active team roster.
There is also a stipulation that a team may only carry 45 players on its game day roster, so the team must decide each week on which 8 players will be inactive, or 7 if they carry a 3rd quarterback.
Chat with our AI personalities
The official number is 45, but typically each team really has 46 players suited up each game because of the "inactive quarterback" rule. Typically the number 3 quarterback is listed as one of the 8 inactive players each week, but is suited up, and is allowed to come into the game under special rules.
Twelve active players are allowed to be on an NBA roster during each individual game.