Don't look at it in terms of "Oh, this player didn't play for ALL of those franchises."
The Gund family owned the Seals and Barons throughout their short histories. They then got ownership of the Minnesota North Stars. That is the link between the California Golden Seals, Cleveland Barons, and Minnesota North Stars.
Soon, the North Stars experienced a drop in attendance, and the Gund family wanted to move them back to the Bay Area. But the NHL didn't want to lose their prescence in the Minnesota area, so they let the Gunds sell the North Stars to another person and awarded them an expansion team in the Bay Area, which was the San Jose Sharks. This is the link between the North Stars and Sharks.
The dispersal draft was made so that the Sharks could make a team from the North Stars. They selected 14 skaters and 2 goaltenders from the North Stars. There's another link between the North Stars and Sharks.
So the Barons, Seals, North Stars, and Sharks, are all connected through having the same owners, and there aren't any player links between the four franchises except for the one between the North Stars and Sharks.
Got it?