2020 MLB POST-SEASON ROSTER ELIGIBILITY RULES
A club's 2020 Post-Season Eligibility List is established at midnight (Eastern) on September 15th.
NOTE: In prior seasons (pre-CoViD-19) a club's Post-Season Roster Eligibility List was established at midnight (Eastern) on August 31st.
A club's Active List (28-man roster) must be submitted to the MLB Commissioner prior to the start of the first game of each post-season series (Wild Card game, LDS, LCS, and World Series).
NOTE: In prior seasons (pre-CoViD-19) the post-season MLB Active List roster limit was 25.
A club's Active List can be changed (tweaked) prior to the start of the first game of each series (WC, LDS, LCS, and WS).