David Krejci, out with a core injury for the last three games, guessed he was 50-50 for tomorrow’s game against Toronto. Krejci practiced on the third line with Jordan Caron, Benoit Pouliot, and Rich Peverley. If Krejci can’t play, Peverley most likely will center the No. 3 line tomorrow.

* Claude Julien tweaked his lineup today. Chris Kelly centered the first line between Milan Lucic and Tyler Seguin. Nathan Horton skated on the No. 2 line with Brad Marchand and Patrice Bergeron. “I don’t know what I’m going to get,” Julien acknowledged regarding his changes. “What I know is that what I was getting before wasn’t enough. I just felt the need to make those changes.”

* Adam McQuaid didn’t practice today. Yesterday morning, Julien said McQuaid was a game-time decision for last night’s match. But McQuaid didn’t participate in warmups, and appears to be out for at least tomorrow’s game. Julien didn’t specify the nature of McQuaid’s symptoms.

* Steven Kampfer participated in contact drills today. Kampfer could be a game-time decision tomorrow. Kampfer hasn’t played this season after suffering a sprained MCL in his left knee Sept. 29.

* Horton said he thought Tim Gleason wanted to fight in last night’s third period. “He kept acting like he was going to,” Horton said. “It was not the right time. I know that. Just out of frustration, I guess.”

@GlobeFluto