The NRL career of South Sydney centre Kirisome Auva'a could be over after he recorded a second strike under the NRL's illicit drugs policy.

The Rabbitohs are considering tearing up the contracts of Auva'a and teammate Paul Carter for code of conduct breaches as the club's horror season takes another turn.

South Sydney Rabbitohs centre Kirisome Auva'a. Credit:Getty Images

Just weeks after Parramatta superstar Corey Norman was charged over possession of MDMA – also known as ecstasy – capsules and muscle relaxants at Sydney's The Star casino, it's understood Auva'a recorded the second incursion of his career under the NRL's illicit drugs policy. The contravention is believed to be the result of irregularities presented during routine testing at the club. Auva'a did not return a positive test for an illicit or hazardous substance but still faces the prospect of a 12-match ban.

The 24-year-old had until 4pm on Wednesday to lodge an appeal but he and his representatives chose not to do so.