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Description of the data topic Active Rosters. This includes the definition as well as the coverage of the data topic or element on the site.
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Active Rosters



Players on the current Major League Rosters are considered to be on a team's Active Roster. These are players who are currently eligible to play in a game at the moment they are active. For Regular Season games before September 1 and playoff games, teams can carry 25 active players. From September 1 to the end of the season, teams are permitted to expand their rosters to 40. Minor League seasons typically end in early September. For a player to be eligible to be added to the Active Roster, the player must already be on, or be added to, the 40-man roster. The 40-man roster includes the 25-man roster, injured players and minor leaguers who are eligible to be promoted/demoted as many times as the team wants provided they don't have more than a certain amount of service time in which case their rights are increased with regards to movement.

The Active Roster can be modified at any point before or after a game but prior to each game, 25-men must be listed on the roster. Injured players whose injuries are considered minor (day to day) may remain on the active roster even though they may not be medically cleared to play that day, thus decreasing the number of available players on a roster. If the player's injury is more serious, he can be removed from the active roster and be placed on the disabed list. Players who are more seriously injured can be removed from the 40-man roster, thus opening up a spot for another player. The injured player is still protected and must be reinstated to the active roster after 60+ days.

A player's service time will be incremented by a day for each day he is on the active roster or the disabled list, whether he plays or not.