Greg Wyshynski reports on Mitch Marner getting traded from the Maple Leafs to the Golden Knights. (1:49)Open Extended ReactionsMitch Marner was traded to the Vegas Golden Knights -- with an eight-year extension in place, sources told ESPN on Monday. Forward Nicolas Roy will go to the Toronto Maple Leafs in return. The Maple Leafs knew that Marner was looking to test free agency at the end of the season. Ahead of the Marner trade, the Golden Knights created cap space by sending defenseman Nicolas Hague to the Nashville Predators on Monday.