Wests Tigers centre Tim Simona is facing a ban after becoming embroiled in a betting scandal.
The NRL issued Simona with a notice to cancel his registration after he was alleged to have broken rules relating to gambling on the game.
Simona has the right to appeal but has been stood down from training and will not be allowed to play before the matter is finalised.
He was withdrawn from the Tigers squad for their final trial against North Queensland at Campbelltown on Friday night.
The governing body did not reveal the allegations against Simona.