<P> 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 . A postseason roster is allowed up to 25 active players . Other players who are not on the 25 - man active roster will be assigned to the postseason secondary squad . Players who are on the disabled 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 25 - man active roster are allowed except when a player is moved to the disabled list or any other inactive transaction . If a player is moved to the disabled list or another inactive transaction during a series , he then becomes ineligible to be returned to the 25 - 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 25 - man active roster for the remainder of the series if applicable . </P>
<P> 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 . A postseason roster is allowed up to 25 active players . Other players who are not on the 25 - man active roster will be assigned to the postseason secondary squad . Players who are on the disabled 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 25 - man active roster are allowed except when a player is moved to the disabled list or any other inactive transaction . If a player is moved to the disabled list or another inactive transaction during a series , he then becomes ineligible to be returned to the 25 - 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 25 - man active roster for the remainder of the series if applicable . </P>
how many players on the mlb playoff roster
how many players on the mlb playoff roster
25 active players
25 active players