Dragons prop Leeson Ah Mau was charged by the NRL match review committee in Round 20.

Four cop NRL suspensions

Leeson Ah Mau, Mitchell Barnett, Josh McGuire and Sam Thaiday have received NRL suspensions while Eels forward Manu Ma'u will challenge a dangerous throw charge at the judiciary on Wednesday night.

Dragons forward Ah Mau will miss three weeks for a grade three careless high tackle on Wests Tigers prop Tim Grant after entering an early guilty plea.

Likewise Knights second-rower Barnett will miss two matches for a shoulder charge on Andrew Fifita, while Broncos duo McGuire (dangerous contact - head/neck) and Sam Thaiday (dangerous throw) will both miss one match.

Tigers forward Sauaso Sue and Warriors forward Bunty Afoa both escaped bans after pleading guilty to grade one dangerous contact charges while Rabbitohs prop Tom Burgess has until midday on Wednesday to enter a plea.