Josh Addo-Carr has stood himself down from the Bulldogs elimination final this weekend following a sit-down with club officials related to an alleged positive roadside drug test on Friday evening.

Addo-Carr, who is said to "vehemently" deny the allegations, voluntarily made himself unavailable for the match, Canterbury general manager of football Phil Gould announced at a snap press conference on Tuesday.

The Bulldogs, set to play their first finals series since 2016, are due to meet Manly at Accor Stadium on Sunday afternoon.

The winger's decision comes after reports of the alleged positive roadside test emerged on Monday.

It's understood initial testing returned a positive result for cocaine, before secondary testing was taken by police for analysis.

Speaking on 100% Footy on Monday night, Gould said Addo-Carr alerted the club to the roadside test before conflicting interpretations of events became apparent.

"He did, in fact, test positive at the scene. He felt it was inconclusive. The policeman did say it was positive," Gould said.

"Now, what Josh thought was because he went and did the second test, and they allowed him to go. He thought that was negative. That's where he was getting the thought, well, I've got no case to answer.

Speaking on Tuesday, Gould confirmed Addo-Carr had stood himself down, but maintained his innocence.

"What I can say right off the top is that Josh vehemently defends himself here and his innocence in this matter, that as far as he's concerned, he's done nothing wrong, he's taken no drugs, and he can't understand why he tested positive once at the scene of this roadside test on Friday night," Gould said.

"However, putting the club first and the team first, Josh has made the decision to stand down from this week's game, to not make himself available so the team can get on with its preparation.

"I think that's a great thing for Josh to do on behalf of the club and the team, but I want to emphasise that Josh believes he's completely innocent...and can't understand how he's tested positive to this initial roadside test."

On Monday night, Gould stated there had been no attempt over a "cover-up" from the club, and made no suggestion Addo-Carr had attempted to mislead officials in his recount of events.

Speaking Tuesday, Gould addressed the apparent conflicting accounts.

"I'm convinced that when Josh left the scene of the roadside test on Friday night, that he was convinced that would be the end of it. And that's probably the way he represented it to us," he said.

"It's probably been said that Josh, in some way, has lied to us or mislead us. I guess there are degrees of truth. And Josh, in his own way, felt that this matter wouldn't be raised again when he left the scene on Friday night - that that would be the end of the matter.

"So I don't think he deliberately misled me or lied to me. He probably didn't give me the whole version of what had happened there on the night, which I now have at my disposal, and the club will support Josh through this difficult time."

Gould said there was no requirement forcing the club or Addo-Carr into the decision.

"Under the RLPA (Rugby League Players Association) and CBA (Collective Bargaining Agreement) rules, we have no reason to stand Josh down from the game this weekend until the results of that last test is known," he said.

The wait for results, and "truth of the matter", could extend past the end of the finals series, Gould said.

"At this point in time, we're looking after Josh and his family. We accept Josh's belief in his innocence and will support him through that process," the Dogs' footy boss added.

Addo-Carr's lawyer, according to Sydney Morning Herald, reiterated the footballers' maintained innocence.

"It is clear that Josh was pulled over and tested on Friday," Elias Tabchouri said in a statement, according to the Sydney Morning Herald.

"That test returned a positive result. This result surprised Josh as he states and maintains that he did not ingest any drugs not prescribed by a doctor at any time.

"As per legal requirements, a secondary test was taken that has been sent away for analysis. At some point, the result of this test will be made available. In relation to this whole incident, there is a prescribed procedure that police must follow.

"Josh and police leave the scene after the second test was taken and prior to any other testing, leading to question marks in relation to any possible police irregularities, as reported by certain media outlets."