Dreger was on TSN1050's FirstUp where they were discussing possible moves to the Leafs coaching staff after Craig Berube was brought in to replace Sheldon Keefe. After all, we should not expect Berube to just rely on Keefe's old crew. He specifically mentioned Lambert as a possible addition to be a forwards specialist with the team.
This lines up with other recent rumors surrounding the Leafs. Fellow insider Elliotte Friedman reported a couple of days ago on 32 thoughts that Lane Lambert was connected to the Leafs in some form, although he was a lot less specific with the details. That being said, it is encouraging that multiple sources are now reporting the same thing.