The headline asks a basic question, but the answer varies depending on who you ask.
Before we get into the nitty-gritty details, here are a few basic facts surrounding Mats Zuccarello. On September 1, Zuccarello turns 31 and will be in the final year of a four-year, $18 million contract signed on March 2, 2015. His cap hit is $4.5 million and there are no clauses on his contract according to Cap Friendly.
This matters because players who are in their walk year carry less value than a player with term. The most obvious example is deals at the NHL trade deadline where rental players generally fetch a secondary or tertiary prospect, or a late first-round pick.