In the old days in preparation for the Canada Cup Team Canada used to hold a formal training camp and there were a lot of players invited. It wasn't like today where they name a team and that's it, unless there's an injury. There were actual cuts and battles for jobs.
In fact, my memory may be off, but I seem to recall them bringing enough players to camp to have almost two full rosters. The 1991 Team Canada training camp was held in Collingwood, not far from my home. I didn't attend, but several of my friends did and met many of the players.
I do recall that both Gary Leeman and Dave Ellett of the Leafs were at the training camp. There may have been more as well. Possibly Damphousse.