Just like anyone else become good at the game.
18 players are in a baseball game, 9 on each team on the field.
five baseball players
in MLB a team must start the game with 9 players or they forfeit the game
A baseball lineup is the list of players that will participate in a game.
Nine
9
13
The team is out when three players are out.
Anyone, or all of the ballplayers that played in the 1985 All-Star game could have signed any given baseball. There was also more than one baseball signed, and it would be impossible to know who signed The baseball. You have to be more clear on what you are asking.
Yes, there are over 2 million players on the game
9 on each team