NRL investigating Bennett's Napa spray

Murray Wenzel
Brisbane veteran Sam Thaiday (R) has backed coach Wayne Bennett's crack against the NRL

Claims of an NRL bias against Brisbane by coach Wayne Bennett will be among those investigated by the code as the fallout from the Dylan Napa tackle that broke Korbin Sim's jaw continues.

The Broncos coach launched a stinging attack on the NRL after the Sydney Roosters prop escaped sanction from the match review committee over the head-on-head tackle on Friday night.

Bennett unloaded on the NRL after Napa, who was sin-binned and reported for the tackle, avoided further sanction.

"Why hasn't the game made Napa accountable?" Bennett told News Corp.

"I know there will be a s***fight coming my way but I'm not backing away from it.

"I am not going to watch my players get broken jaws and remain silent.

"When you go before the judiciary, they will ask the player, 'What was your duty of care?'

"Where is Napa's duty of care?"

Roosters coach Trent Robinson gave an eloquent post-match defence of Napa, saying the collision was a regrettable accident after Sims stepped late in a bid to avoid Napa's left shoulder tackle.

Bennett hit back saying Napa was reckless in the way he went into the tackle, planting his feet and leading with his head.

He accused the MRC of inconsistency, pointing to Thaiday's suspension for wrenching the hand of Melbourne's Jesse Bromwich last year.

"There is a bias against the Broncos," he said.

"We won a game we weren't supposed to win so that would have pissed off the Roosters even more.

"Last year, Sam pulled Jesse Bromwich's finger. He was found guilty for contrary conduct.

"Are you telling me a finger pull is worse than Napa breaking Sims' jaw with a reckless tackle?"

The NRL confirmed on Monday it was "seeking clarification around the comments", while Bronco Sam Thaiday revealed his own annoyance at the incident had more to do with what happened after the hit.

"We've got a player laying on the ground that's injured," Thaiday said.

"I understand we play a contact sport ... big tackles occur in our game.

"I took offence when they were celebrating the tackle and we've got a player laying on the ground injured.

"It's why I got in there and got choked out a bit, it reminded me of the good old days."