Thornton, who spent 15 seasons with the Sharks, was minus-1 in 10:03 of ice time after missing 13 games with an undisclosed injury. He had not played in San Jose since March 11, 2020, and last played as a visitor there March 21, 2003 when he was with the Boston Bruins.
"I can't say enough about him," Sharks defenseman Brent Burns said. "I think he's an incredible human. Obviously, an incredible hockey player, but I think it's the off-ice stuff. He's just special. I think he's one of a kind. He's an incredible, incredible guy. ... The reception that he got and the video, it was great. You could ask Steven Spielberg to do a two-and-a-half-hour movie with him and nobody would get bored."
Jonathan Huberdeau scored to extend his road point streak to nine games for the Panthers (41-13-6), who are 6-0-1 in their past seven games. Spencer Knight made 24 saves.
"I think we kept our composure," Florida coach Andrew Brunette said. "I really liked our game besides some of the things we were doing in the second period. We got a little carried away. We kept our emotions intact, and I thought we regrouped after two and had a great third period."