Is this seriously a defense for why it wouldn't be dumb as hell to trade Sprong for Kane? Seriously?
Are people forgetting who Sprong is? We're not talking about a prospect that's 4 years away from being NHL ready. If he's not traded, he's going to be in the NHL this year. Trading him for a rental is absolutely asinine. Not only because trading a NHL ready prospect with top-6 potential for a rental is absolutely insane, but also because adding Kane doesn't guarantee the Penguins a cup and the Penguins aren't desperate enough for a cup to do that kind of move.
This isn't about "prospect cups" or "cap space", it's about trading a high potential, NHL ready player with control for a rental being ****ing stupid.