From WTC: 

The Sharks did not make Joe Thornton available to the media after that 4-2 loss and Todd McLellan said he had nothing to report yet when he was asked about his captain’s status during the post-game press conference.

But a text message to Thornton several hours later did get this response when he was asked the chances he’d be ready to play in Game 5 on Tuesday night.

“100 percent,” he wrote to my Mercury News colleague Mark Emmons. “It’s playoffs, got to play through everything.”

No word on whatever it was that caused Thornton to leave the game after taking a shoulder-to-shoulder hit from Raffi Torres at 10:57 of the first period, but figured I better pass along what limited information we have.