Garrick's broken back sparks NRL rule change debate

The fullback landed heavily on his back after having his legs clipped by an on-rushing Charnze Nicoll-Klokstad as both players attempted to regather a bouncing ball.

Tackling players in the air is outlawed but there is no rule which forbid players from competing for a bouncing ball.

Manly coach Anthony Seibold was livid his side weren't awarded a penalty, describing the officiating as "ridiculous" with the Warriors going up the other end of the field and sealing victory.

NRL football boss Graham Annesley has backed his officials but said head office would explore changes to the rules to prevent similar incidents in the future.

Manly chief executive Tony Mestrov underlined his draw a line under the matter but insisted rule changes were a matter for the NRL.

"We've expressed our view as a club and the injury vindicates that," Mestrov told AAP.

"Reuben has a fracture in his back and is in doubt this week, maybe next week too and, we would argue that indicates that it was a dangerous tackle and backs up what Anthony said.

"We've said our piece, it's time for us to move on but it's up to the NRL to make sure that when future decisions are being made common sense should prevail."

Garrick, who has deputised well for Tom Trbojevic this season, is set to play through the pain barrier in the club's final two games against Canterbury and Wests Tigers.

Fractures to the transverse process do not require surgery and pose little threat of damaging the spinal cord.