According to the text messages revealed by the ABC's 7.30, sports scientist Stephen Dank and Essendon coach James Hird had suspicions about Collingwood, West Coast and Hawthorn.
But speaking from New York where he is meeting with leading sports bodies on all matters equalisation, AFL chief executive Andrew Demetriou said the three clubs were in the clear.
"We've worked very closely with ASADA, we've been briefed by the ACC and we're not privy to any information that supports the inference or the suggestion that those three clubs are involved in any way in the use of performance enhancing drugs," he said on Triple M on Thursday.
"If that was the case, we would have heard by now I would imagine."
The three clubs happen to have representatives with the AFL in New York on the fact-finding mission and Demetriou said it hadn’t been "pleasant" for them to have been linked to illegal supplements use.
Hawthorn president Andrew Newbold said he was "pretty disappointed" with the reported comments.
"I think there comes a time when clubs need to concentrate on getting their own house in order rather than commenting on other clubs, so that's pretty disappointing from our point of view," he said on Triple M.
The ASADA report into the Essendon supplements program is likely to be released within the next few days.
But in a development that might keep the Bombers squirming in their seats for a while longer, Demetriou admitted on Thursday that the investigations into the Bombers may continue for a period after that.
He said it wouldn't be unusual for ASADA to continue its enquiries even after the release of the initial report.
"They've been recently given new powers and they may choose to exercise those powers and it happens in the AFL. Often we conduct an investigation and we leave parts of it open in case new information comes to light," he said.
"But I'm not privy to that. I'll wait for the investigation to come out and be informed once I've got the report."
Demetriou said the travelling party in New York had yet to see the Dean Robinson interview on Channel Seven but had read the quotes that were reported in the media thereafter.
