

The only exception is that a player who is on the injured list at the end of the regular season may be replaced on the postseason roster by any other player who was in the organization on August 31, with the approval of the Commissioner. To be eligible for a team's postseason roster, a player must be on any of the following: (a) the 40-man reserve list, (b) the injured list, or (c) the bereavement list as of August 31 at midnight ET. (Before the 2020 season, any player on the 40-man reserve list, also referred to as the "expanded roster", was eligible to play in an official regular season game on or after September 1.) Many young players make their Major League debuts in this way, as "September call-ups." From September 1 through the end of the regular season, each team is required to expand its active roster to 28 players.
MAJOR LEAGUE BASEBALL TRANSACTIONS PLUS
The 40-man reserve list includes the players on the 26-man roster plus as many as 14 players who are either on the team's seven-, ten-, or 60-day injured list, who are on paternity leave for up to three days, or who are in the franchise's farm teams in Minor League Baseball. Players on the 26-man roster are eligible to play in official major league games throughout the season. Main article: Major League Baseball rostersĪs of the 2020 season, each Major League Baseball team maintains a 26-man active roster, a 28-man expanded roster, and a 40-man reserve list of players.
