There are a few threads that explains this.

Players with red cards will be visible in the lineup. There are probably or used to be 11 players there but it is either

1. The player has retired so is removed from the starting 11 or
2. The contract is not renewed yet, so the player doesn't show up in the graphic

But at match time, the game will fill in the blanks with subs and reserves and if there is enough then the game will go on. If there is less than 11 players available then you will be given a 3-0 win.

You can assume that this is a team in transition to being abandoned and more than likely you will have > 70% possession against him because of OOP (out of position players)

Cheers