Here are the obstacles to trading Karlsson: • He has a no-movement clause. Though many assume he would be willing to move on ...

But Erik Karlsson, once the most dominant defenceman ... then-Sharks teammate Jacob Middleton and young prospect Ozzy Wiesblatt followed suit, the group falling into a chummy summer routine ...

Karlsson, 34, carries a $10 million cap hit for two more seasons after this one, with the San Jose Sharks already retaining ...