His third shift, he looked like he never left. Flying up the right wing, he took a pass from defenseman Victor Hedman, slipped past a check by Dallas defenseman Esa Lindell along the boards, skated into the right circle and snapped a shot high into the far side of the net, giving the Lightning a 2-0 lead at 6:58 of the first period.
He leapt into a hockey hug with teammate Patrick Maroon. The Tampa Bay bench erupted.
"It was amazing to have him back on the ice, and for him to score that goal, we know it meant a lot to him," Hedman said. "And you can see the reaction on the ice and on our bench when he scored that goal. That's how much he means to us as a teammate and as a leader and as a friend, so we were super happy for him."
Stamkos played two shifts after that. He talked to the trainers on the bench and didn't come out with his teammates to start the second period. Eventually, slowly, he walked back to the bench but didn't take the ice except to test his body during TV timeouts.
Cooper called it "unexpected" but said Stamkos gave the Lightning a lift first by playing, then by scoring and finally by sitting and speaking on the bench.
"I wanted to play as much as I could," Stamkos said. "It's just … Yeah, obviously there's an issue I've been working through, so we'll see what happens from here. But like I said, I was just extremely happy to be out there with these guys and have a chance to just be on the bench and contribute to a win."
Whatever happens from here, this will live forever in his memory, in his legend, in lore.
"In this playoffs, it's been different for him, and to be able to come back and do what he did in this limited time he had is pretty remarkable," Cooper said. "It's been months and months in the making for this moment, and he delivered when we needed him."