"I'm playing," the Ottawa captain said after his team's skate. Alfredsson missed the previous three games and most of Game 2 with a concussion after taking an elbow to the face from Rangers rookie Carl Hagelin in Game 2.
Hagelin also returned Monday night after serving his three-game suspension.
The Senators, despite winning three of four games after Alfredsson was injured, understandably were pumped to have Alfredsson back.
"He's the captain, so he's obviously a big part of this club," Senators coach Paul MacLean said before the game. "He could help us on the power play as well."
The Senators did just fine without Alfredsson, in part because of the pro debut of 19-year-old wing Mark Stone, who came straight from Brandon of the Western Hockey League to make his pro debut in Game 5. He had the primary assist on Jason Spezza's first-period goal in Ottawa's 2-0 win.
But Stone took a seat for Game 6 with the arrival of another prized Senators prospect. Forward Jakob Silfverberg, fresh off being named MVP of the Swedish Elite League playoffs after his team, Brynas, won the championship, flew to Ottawa over the weekend and made his NHL debut Monday night.
"His team won the Swedish League and he was the MVP," MacLean said. "I like that."
It wasn't just the way the Senators compensated for Alfredsson's absence but also their ability to roll with whatever changes each game brings that had them on the verge of advancing.
"We all just complement each other really well," Nick Foligno said. "When you have depth like we have and we all feel the same way, guys can play any role."
Alfredsson skated with the Senators the morning of Game 3 but said he started to feel concussion symptoms again later that afternoon and was shut down for three days. He rode a stationary bike Friday, skated on his own Saturday and practiced fully Sunday.
"It's going to be important for me to get in and get involved right away," he said. "I need to get involved physically because that's the way we've been playing."
Also on the ice was Chris Neil, who scored the first goal in Game 6 after knocking Brian Boyle out of action with a concussion in Game 5. He did not have a hearing for the hit. "I don't really have a comment on it," Neil said of escaping punishment. "Obviously, the league thought it was a clean hit."
Neil also got in a first-period fight with Brandon Prust.