In Major League Baseball (MLB), which is the highest level of professional baseball in the United States, there are 25 players on a team’s active roster. This includes both position players (e.g., catchers, infielders, outfielders) and pitchers.
However, during the regular season, only 26 players are allowed to be on a team’s active roster. This is due to the “26th man rule,” which allows teams to call up an additional player from their minor league system for a doubleheader (two games played in one day). After the doubleheader, the 26th man is sent back down to the minors, and the team returns to a 25-man roster.
It is worth noting that MLB teams also have a 40-man roster, which includes all of the players on the active roster as well as additional players who are on the team’s reserve list. This allows teams to have additional depth and flexibility throughout the season, but only the 25 players on the active roster are eligible to play in a given game.