Any player in the senior team that's rating 23 or below at the end of the season will be removed from the game, whether they are eligible for the U23s or not. If they are eligible for the U23s then it is recommended that you move them before the end of the season (players will be removed after the EOS rerates)
With the introduction of the Abs Exchange Market, this has been modified slightly as the players, in general, are now eligible for the AEM.
However there is a need to remove the vast quantity of low rated players in the senior teams so this is being delayed until MARCH 1ST 2023 meaning that any players in the senior team rated 23 or below on March 1st will be removed from the game.