The NRL’s calling on referees to crackdown on head contact.

It comes as the sports latest round saw 18 yellow cards.

But some are saying it’s part of the game and becoming too strict runs the risk of slowing the game down.

Sportstalk host D’Arcy Waldegrave joins the show to discuss how the rules might change, a new game coming to New Zealand that has people concerned.

LISTEN ABOVE.