The NRL's integrity unit is expected to call Andrew Fifita in for questioning over an alleged public show of support for one-punch killer Kieran Loveridge.
Fifita has been spotted displaying the initials FKL on his wristband in at least seven matches this year, according to News Corp Australia images.
The revelations come after the Sharks prop was warned by NSW Police on Wednesday for consorting with criminals after he made several visits to Loveridge in Cessnock jail.
Loveridge was responsible for the high-profile manslaughter of 18-year-old Thomas Kelly in 2012 during a night out in Kings Cross, and is serving a minimum 10-year sentence.
It's believed Fifita could have once coached Kelly's killer, and that FKL stands for either "For Kieran Loveridge" or "Free Kieran Loveridge".