Pittsburgh leads the best-of-7 series 2-1. Game 4 is here Monday (8 p.m. ET; NBC, CBC, TVA Sports).
The Sharks held serve in part because Thornton didn't lose his head when many on the outside expected him to. He had waited through 18 NHL seasons for this moment, and it looked to be slipping away.
Rather than being time to panic, to Thornton, it was time to redouble his efforts.
"You just feed of him," center Chris Tierney said. "You watch him out there, he never gets frustrated. He never panics. He just works hard every shift, comes to the bench and then goes out and works hard again. It's pretty easy to watch and try to mimic him."
Anyone can mimic Thornton's work ethic, in theory. Precious few can mimic his skill.
"I've said it for a long time, that guy is a legend," defenseman Brent Burns said. "He's unreal. He's one of the best to play. He's so good at protecting the puck and making plays. He's huge for us."
Thornton played 25:51 in Game 3. He played with different forwards, starting the game with Melker Karlsson as the third wheel of the Thornton-Joe Pavelski combination. Late in the game and in overtime, Logan Couture was in that spot.
"Obviously the biggest game of the year; at that point, I thought we were going to live and die with the big guys," San Jose coach Peter DeBoer said. "We needed the win."