If Stamkos wants to leave, he's going to leave. And if he does, they're going to trade him near the deadline. They cannot let him walk for nothing. I feel like he'd give them the courtesy of letting them know if it was indeed his plan to leave. Granted he was much older, but they've already made a similar move recently with the St. Louis trade, a franchise icon. It would be tough, but they will if they have to.