Cronulla forward Reni Maitua is facing a possible two year ban for testing positive for a banned substance.
Maitua will wait on the results of a ‘B’ sample which is expected to be returned in around a week.
Cronulla Chief Executive Tony Zappia said the news was “disappointing”.
He told AAP: “Obviously, it’s disappointing for Reni … the club, the supporters, the players, corporate sponsors and all those people who are at home who support the Sharks.”
The incident follows revelations of a group sex scandal in 2002 on television but Zappia says that sponsors will stand by the troubled club.
Zappia added: “I think we’ve got some very good sponsors, and I think that sponsors will see this in a separate way to past events and I think they will remain solid.”