Charlie McAvoy will not be available when the Bruins take on the Arizona Coyotes this afternoon (1 p.m.) at the Garden after taking a high hit on Thursday night from Buffalo’s J.J. Peterka.

“There’s been significant improvement, but we’re not risking today,” said coach Jim Montgomery.

The exact nature of the injury has not been divulged, but Montgomery said on Friday that it is not a head injury. McAvoy’s status is day-to-day.

Ian Mitchell will take McAvoy’s place in the lineup while Hampus Lindholm will jump in his spot on the first power-play unit.

Linus Ullmark will get his second straight start for the first time this year as Jeremy Swayman gets over the illness that kept him out of Thursday’s game.

“If someone’s not near 100 percent, we’re going to go with the other guy, just like we did in Florida when (Ullmark) had an upper body injury,” said Montgomery.

Up front, Jakub Lauko will be a healthy scratch. Montgomery said it was a good time for Lauko, who hasn’t scored a goal in his 18 games this year, to have an reset.

“I think he has been playing well, but what we’ve seen is there’s a tail-off from the first period to the third period,” said Montgomery. “Even though he knows and he relishes his role and he’s a tremendous young man, we all need to score to feel good about ourselves. You want to contribute, you want to jump in the glass and celebrate with the Bruins fans. There’s been a couple of games where he’s had some good chances early and the intensity of how he gets those chances, which is through his checking and his tenacity on pucks, kind of fades. We want him to go 60 minutes for us.”