Tampa Bay has reached the conference final three times in the past four seasons. It lost Game 7 to the Pittsburgh Penguins in 2016 and advanced to the Stanley Cup Final in 2015, when it lost to the Chicago Blackhawks in six games.
Stamkos said he does not feel like the championship window is closed on the Lightning and points to young players including goalie Andrei Vasilevskiy, 23, forwards Brayden Point, 22, and Anthony Cirelli, 20; and defenseman Mikhail Sergachev, 19. Those four, along with Stamkos; defenseman Victor Hedman, a Norris Trophy finalist; and forward Nikita Kucherov should keep the Lightning near the top of the standings next season.
Coach Jon Cooper said Sergachev made incredible strides this season, and Vasilevskiy, a Vezina Trophy finalist, proved he is on track to become an elite goalie in the NHL.
"Talk about a growth year [for Vasilevskiy], getting the net as a full-time starter, playing [65] games," Cooper said. "That's a hard thing to do and mentally he passed all those tests. Then for me, it's winning a playoff series. And he had played in the playoffs but he hadn't won a playoff series, so for him to come in here and take two this year and almost a third, that just spells positives for him moving forward."
The Lightning will enter the offseason in good health, although forward Ryan Callahan said he will need to have a procedure done on his shoulder and, depending on the severity, could miss time in training camp.
Callahan said the loss to Washington will stick with him like the other playoff losses he's had in his NHL career, but he believes Tampa Bay has the players to win the Stanley Cup.
"I definitely think we're capable," he said. "Our body of work has shown that we're right there. The guys that we have in that room have the ability to take that next step. The core has been together for quite a while and accomplished some good things. We want to win together, that's for sure."