If Sunderland did know about it, but still allowed him the play in front of thousands of impressionable children, surely that brings that game into disrepute, and for that they could get punished?
Gameweek 27
West Ham 2 v 1 Sunderland
Leicester 2 v 0 Norwich
Southampton 1 v 1 Chelsea
Stoke 2 v 0 Aston Villa
Watford 1 v 2 Bournemouth
West Brom 1 v 2 Crystal Palace
Man Utd 0 v 2 Arsenal
Spurs 2 v 1 Swansea