I hope I don't miss some information because I am only familiar with the screens of old version.

There is no 14 player restriction during the season. So, as I understand, we can sell players even if our teams has only 14 players or less. If our team is insolvent, the board should also force to sell players even if we are absent. But I am not sure if we can still sell players if we have 11 players or less so as to guarantee the team can successfully tank.

I don't have experience because I only used to have 14 players for very short period in about 2 season beginnings.

BTW, if both teams have less than 11 players before a match, what will happen?