PITTSBURGH — A flurry of trades has stunned the NHL this week.Amazingly enough, several big names are still expected to be traded between now and early July. We haven’t seen anything like this in quite some time.Pittsburgh Penguins general manager and president of hockey operations Kyle Dubas has stated on numerous occasions that he wants to make trades to replenish the team’s roster. He’s playing the short game and the long game.With that in mind, let’s take a look at Chris Johnston’s most recent trade board. In fact, let’s take a look at the top 10 names on his board and break down which names make the most and least sense for the Penguins.1. Jason Robertson, Dallas Stars

Age: 26

Contract: Restricted free agent Why it makes sense: The Penguins want to acquire talented players in their mid-20s who, for whatever reason, might no longer fit with their current teams.This is the dream scenario. Robertson is a star, but he might not be a Star much longer. Dallas, apparently, can’t afford him. It’s no secret that Dubas has coveted him for quite some time.Why it doesn’t make sense: The Penguins would have to surrender so many assets in a trade for Robertson that trading for the left winger could be counterproductive for a franchise that has finally developed its minor-league system after many barren years.The verdict: The asking price might be frighteningly high, and his salary request will be, too. Still, this is a great player and someone who will fill the net for the next decade. He would help during Sidney Crosby’s final years and long after that. Sometimes, you have to spend a lot to get great players. Dubas shouldn’t wreck his system to get Robertson, but he should offer a multitude of veterans — including wingers that Crosby loves — to get his man.2. San Jose Sharks’ No. 2 pick Why it makes sense: The Penguins are looking to acquire young talent, and the second pick would do the trick.Why it doesn’t make sense: I simply don’t think the Penguins have the assets to acquire a pick this high.The verdict: I’d be careful about overvaluing some of the Penguins’ veteran players. Yes, they’re good, and yes, they could bring a nice return. But we’re talking about the No. 2 pick in the draft. Forget about it.3. Matthew Knies, Toronto Maple Leafs