NRL admitted a penalty mistake in Walsh's headbutt; Klein will officiate a semi-final.
The NRL admitted Ashley Klein got the penalty wrong in the Reece Walsh headbutt incident, as debate raged over whether the Broncos star and Hudson Young's punishment matched the crimes.
Walsh was charged over the headbutt, but avoided a suspension rather than a fine, while both he and Young were sin-binned for the incident, with the Broncos getting the penalty on the field.
The Daily Telegraph's Phil Rothfield revealed Klein got a pass mark for his refereeing in the game and will be appointed to one of the two semi-finals this weekend.
"I can tell our viewers straightaway that Ash Klein the referee, got a pass mark out of this game and will be controlling one of the two finals this weekend," Rothfield said on NRL 360.
"It was a tough game to referee. 94 minutes is tough."