Stone is an exceptional player capable of producing points and driving play at an elite level, especially relative to his teammates. Since 2015-16, he has a relative SAT percentage of 7.21. Carolina Hurricanes forward Nino Niederreiter (7.26) and Boston Bruins center Patrice Bergeron (7.25) are the only two players in that span (minimum 100 games played) to have a better SAT percentage relative to his teammates.
The 26-year-old's point production has shot up since the start of last season. With 119 points in 114 games (1.04 points per game), he's one of 25 skaters to average more than a point per game while playing at least 100 games.
Stone's ability to put up points and drive play, improving the production of his linemates, makes him a very appealing addition. As a result, the Senators should be able to get a substantial package in return if they decide they can't Stone to a new contract and opt to trade him. At the same time, it's hard to improve by unloading star players.
Duchene is another top-tier pending free agent who could be traded if he's not signed to a contract.
Since 2013-14, Duchene ranks 30th with 337 points (144 goals, 193 assists) in 435 games. The 28-year-old is not a dominant play driver like Stone, but he's still a valuable commodity. Stanley Cup contenders who want more strength down the middle might like the idea of Duchene as a second-line center.
That means the price for Duchene could be high, whether that means signing a long-term contract with the Senators or the return he'll bring if they put him on the market.
But trading Duchene could be doubly painful because of the price the Senators paid to acquire him last season. In a three-team deal, the Senators traded center Kyle Turris to the Nashville Predators and goaltender Andrew Hammond, a third-round pick in the 2019 NHL Draft plus a protected first-round pick in the 2018 NHL Draft to the Colorado Avalanche. The Senators elected to keep their 2018 first-round pick to select forward Brady Tkachuk at No. 4, thereby surrendering their first-round pick this year to Colorado. That pick holds the best odds to win the NHL Draft Lottery as of today.
When they made the trade, the Senators thought they were acquiring Duchene to put them over the top as a contender after reaching Game 7 of the 2017 Eastern Conference Final against the Pittsburgh Penguins. But those circumstances have changed, and the price paid for Duchene is a sunk cost, which remains part of the conversation about Duchene's future in Ottawa.