page_title: Major League Baseball rosters
section_title: Postseason roster
hierarchical_section_title: Major League Baseball rosters / Postseason roster
caption_attribution_description: Raúl Adalberto Mondesí
context_page_description: A Major League Baseball roster is a roster of players allowed, by league agreement, to play for their respective Major League Baseball team. As of the 2019 MLB season, there were generally two types of rosters, the "active roster" of 25 players and the "expanded roster" of 40 players. The active roster size will expand to 26 players beginning in the 2020 season.
context_section_description: A postseason roster takes effect only if a team clinches a playoff berth. Players who are part of the team's final roster at the end of the regular season are eligible to participate in the postseason. Any player who has been traded from a different team, spent time in the Minor Leagues, or signed later in the season with the team (no later than August 31) is eligible to participate in the postseason; players who are suspended for drug use are not allowed to participate in the postseason. From 2020, a postseason roster is allowed up to 26 active players (up from 25 through 2019), with a maximum of 13 pitchers (new for 2020); qualifying two-way players do not count against the limit on pitchers. Other players who are not on the 26-man active roster will be assigned to the postseason secondary squad. Players who are on the injured list or any other non-active transaction by the end of the regular season will have their transactions passed on in the postseason. Rosters for a series are set at the beginning of the series and no changes to the 26-man active roster are allowed except when a player is moved to the injured list or any other inactive transaction. If a player is moved to the injured list or another inactive transaction during a series, he then becomes ineligible to be returned to the 26-man active roster for the remainder of the series as well as the next series if applicable. If any player goes on any inactive transaction, any player from the 40-man roster can be promoted to the 26-man active roster for the remainder of the series if applicable.
  For a player to be eligible for the postseason active roster, he must have either been on his club's expanded roster or injured list as of midnight (ET) on August 31 of that year and not placed on the 60-day injured list after August 1. The one exception is for replacing players on the injured list. Since the 2014 season, an injured player eligible for postseason play may be replaced by any player within his club's organization, including players assigned to the club's minor league affiliates who are not on the major league 40-man roster. Prior to 2014, only players who were on a club's 40-man roster (including those added to the expanded roster after August 31, who would not otherwise be eligible for the postseason) at the conclusion of the regular season were eligible to replace injured players on postseason rosters. The 2015 Kansas City Royals were the first club to exploit this new provision when they added Adalberto Mondesí—who at the time was assigned to the Royals' Double-A affiliate and was not on the 40-man roster—to their World Series roster.
caption: Adalberto Mondesí made his MLB debut during the 2015 World Series.
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