Minor leaguers ineligible to add to postseason roster
 

Online league

Players are eligible for postseason roster in the game (confirmed the checkbox in commish mode) and are listed under players eligible for playoff roster. However, if you go to add a player currently in AAA who is eligible to the roster we get the following error (attached at the bottom). It only happens with players not on the current active roster.

Please help.

Your active roster is maxxed out. To add a player to the playoff roster, they need to be on the active roster first. So you'll need to prune down your active roster before you can add guys from the minors.