You're not the first person who I've seen suggest that LeBrun's source was Yzerman. If he starts dropping a lot of Detroit rumors now, we'll know for sure.
I've just always suspected they're friends outside of hockey, based on a few, but pretty consistent, comments by Lebrun. I think Yzerman trusted Lebrun to keep things off the record, if requested, thus, we learned about a lot of our high drama situations after the fact, but sometimes with details that must have been obtained in the moment. (Like Yzerman's text to Lebrun.)
Anyway, I don't know if Lebrun still has sources in TB. I just know that when insiders talk about TB, the only time I sit up and listen is when it's Lebrun. The rest of them know about as much as we do, including McKenzie. But McKenzie still gets to keep his Awesome Card because he straight up admits he never gets anything out of Tampa.
Dreger, the Sportsnet guys, even Friedman... they really never seem to know anything, even when they're reporting on us. Lebrun though, whenever he goes out on a limb, he seems to at least get it part right.