Toronto Maple Leafs played at Maple Leaf Gardens until Feb 1999. The PATH was created before then.

The portion of the PATH connecting Union Station to the ACC is a few hundred metres at most.

I can't see how anyone in Toronto would help people from Montreal enjoy a Habs win over the Leafs. :)

Torontonians call it the "ACC", (short for Air Canada Centre, before its current rebranding to Scotiabank Arena - Google Maps knows both). Also, it's "Skydome", not Rogers Centre. :)