Hull KR prop Jonny Walker is facing the threat of suspension after being charged with making a dangerous tackle on Widnes forward Ben Kavanagh during Sunday's 34-29 home defeat by the Vikings.

Walker, who was making his return from a two-month injury lay-off, has been charged with a grade B offence.

Wingers Chris Riley (Wakefield) and Jason Crookes (Hull) have both been charged with minor grade A offences after clashing during the game at the KC Stadium, where the Wildcats won 23-16. Both players are eligible to make early-guilty pleas.