The St George Illawarra Dragons were made aware that certain contracted players were involved in an incident that occurred in Wollongong on Saturday night.
Dragons prop Leeson Ah Mau and Knights back-rower Mitchell Barnett are both looking at time on the sidelines, charged by the NRL match review committee.
Dragons coach Paul McGregor has pleaded for patience after Sunday's loss to the Tigers, saying there are reasons behind their recent struggles.
Despite a promising start from the Dragons, Wests Tigers dominated through the middle part of the game to run out convincing 25-12 winners on Sunday.
Mitch Moses was the star as the Wests Tigers shrugged off another week of drama to comfortably dispose of the Dragons at ANZ Stadium on Sunday afternoon.
The Dragons and Wests Tigers have both confirmed their final 17 ahead of their Round 20 NRL Telstra Premiership clash at ANZ Stadium on Sunday afternoon.
Former teammates of Dragons halfback Benji Marshall have congratulated the 2005 premiership-winner on bringing up 250 NRL games, but that's as far as it goes.
St George Illawarra lock Jack de Belin believes his club's season is on the line against the Wests Tigers on Sunday afternoon.
This Round 20 clash between the 10th-placed Dragons and 11th-placed Wests Tigers really couldn't be more critical for the finals hopes of both clubs.
The Wests Tigers have announced that Robbie Farah will not play for the club's first-grade team on Sunday against the St George-Illawarra Dragons.