The Bruins placed defenseman Charlie McAvoy and center Pavel Zacha on injured reserve, knocking them out of action for at least seven days since they left the lineup with their respective upper body injuries.

McAvoy was injured in the B’s loss to Buffalo on December 7 and Zacha was injured in the win over Arizona on Dec. 9. McAvoy had begun skating on his own before the team left for their two-game road trip, but Zacha had not started skating yet. In their place, the B’s brought up center Patrick Brown and defenseman Parker Wotherspoon.

The B’s, who play on Long Island against the New York Islanders on Friday and then come home to play the Rangers on Saturday, played without both McAvoy and Zacha on Wednesday in New Jersey and they had an extra forward in Jesper Boqvist, so it’s not clear if there were any injuries stemming from the 2-1 loss to the Devils that would precipitate the call-ups.

Also, there were no takers for Jakub Zboril, who cleared waivers on Thursday.