League rules states that as of APRIL 1st  a player may be added to the roster and play in the league BUT CANNOT participate in the Playoffs, therefore if a player that was added after April 1st is found playing in the playoffs, the team will forfeit the game, NO exceptions. Carrying in excess of 15 players will result in a forfeit as well.

This is NOT an April Fools joke. All teams will need to trade roster when playing in the playoffs, failure to do so could result in a forfeit.