Eriksson sustained a concussion on a hit from the Pittsburgh Penguins' Brooks Orpik early in the first period of a Dec. 7 game in Boston. Later in that game, Thornton retaliated against Orpik, tripping him from behind and then punching him in the face twice while Orpik was on the ice. Orpik also ended up with a concussion, and Thornton was suspended 15 games by the NHL.
Thornton served the final game of his suspension Thursday night when the Bruins lost 4-2 against the Los Angeles Kings.
"I'm excited to be back, obviously," Thornton said after the Bruins' morning skate. "It was a tough night to sleep, for other reasons this time, which is good. I was a little excited. It's been a long time. I can't wait to get it going."
Thornton took rushes on the fourth line with center Gregory Campbell and left wing Daniel Paille. Ericksson skated on the third line at right wing with center Ryan Spooner and left wing Carl Soderberg.
"I'm just going to go and do what I'm supposed to do," Ericksson said. "If I get a hit, I think that's good for me to see how I'm feeling out there. I think it's going to be a good start playing against San Jose. That's a good team to play against. It will be a hard game [Saturday night]."
Thornton said it will take some time to regain his timing, but he has no concerns about his conditioning after working for more than a month with assistant coach Doug Jarvis.
"I'm probably in better shape now than I was going into this," Thornton said. "When Mr. Jarvis gets you every day for [however] many days it was straight, you tend to lose a little weight."
Sharks defenseman Matt Irwin (upper body) will miss his second straight game.
Here are the projected lineups for the Sharks and Bruins: