Hull KR veteran Stanley Gene could be banned for this weekend's engage Super League play-off against Wigan.
The Papua New Guinea international has been charged with behaviour contrary to the true spirit of the game following a clash with Brent Webb in Friday's defeat at Leeds.
Gene is alleged to have made unnecessary contact with Webb's face in the 18th minute of Rovers' 44-8 loss at Headingley.
If found guilty of the grade C offence at a Rugby Football League disciplinary hearing on Tuesday, the 35-year-old faces a suspension of between one and four games.
Castleford half-back Ryan McGoldrick must also appear before the disciplinary committee tomorrow after an alleged high tackle and choke hold on Wigan's Cameron Phelps.
McGoldrick has also been sent a warning letter for kicking out at Warriors forward Andy Coley in yesterday's 18-12 loss at the DW Stadium.
Wakefield prop Richard Moore has received a formal caution for striking after two incidents in his side's play-off defeat by Catalans Dragons on Saturday.
Moore was deemed to have slapped Remi Casty's face and punched Dragons captain Greg Bird.