Complex sentence: At that point, the last two matches of Mouscron had already been forfeited as many players refused to play due to wages from November and December not being paid; three forfeits in a row would have also caused immediate elimination and relegation to the Belgian Third Division.
Split into simpler sentences: At that point, the last two matches of Mouscron had already been forfeited as many players refused to play because the wages of November and December had not been paid. Three forfeits in a row would have also caused immediate elimination and relegation to the Belgian Third Division.