9 players are on the field at once during a baseball game.
11 players I think that each team has 11 players and that there is 7 on the field
12 players are allowed on a volley ball field at one time during a game.
22 players and 7 officals
There are 22 players on the field if you count both sides. Basically making 11 players on the field for one side.
There are 25 professionals on the field during a game - 22 players, 2 linesmen and a referee.
22- 11 on each team. 10 field players and 1 goalie.
The usual number of girls that play on the field during a U9 soccer game is 6 players.