Traditionally, there are nine players on the field... the batter is not included, because he is not a 'field' player/position. There are three outfielders, three basemen, a shortstop, a pitcher and a catcher... that equals 9.
The pitching team can have up to nine players on the field.
Nine - 9
Nine - 9
there are 9 players not including a batter or a umpire.
The maximum number of players on the field at any one time is 13, nine defensive players including the pitcher, and four offensive players, one occupying each base and the hitter. The catcher, by the way, is the only defensive player allowed to be in position not in fair territory. If your questions refers to how many players are allowed in the "outfield" at any one time, the answer is there is no limit, all eight defensive players, including the catcher, if you so choose, may be positioned in the outfield. The only one not allowed is the pitcher, of course, who must pitch the ball to begin play.
18 players are in a baseball game, 9 on each team on the field.
In The game of Baseball there are 9 people in the field at once