Bulldogs Test star Willie Mason has denied he was the player who tested positive to cocaine use.

It was revealed that a player from the embattled club was fined $25,000 last year for failing a drug test.

The news came in the wake of the alleged sexual assault of a woman in Coffs Harbour on February 22 by up to six Bulldogs players.

The Daily Telegraph said it confirmed with senior rugby league sources Mason was found to have traces of cocaine in his system when tested by the club during the off season.

But Mason denied he tested positive to the illegal drug.

"I don't know anything about it," Mason told the Daily Telegraph from his manager's home in Co ogee.

He said the Australian Sports Drug Agency (ASDA) and the Bulldogs had drug tested him numerous times.

"I've never tested positive to anything."

Mason said he was surprised his name was linked to the positive result and was upset he was at the centre of the rumour.

"People have been saying a lot of things about me which aren't true," he said.

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