Team USA will be without Charlie McAvoy in the 4 Nations Face-Off final vs. Canada, but there are several moving parts regarding who’ll replace him.

The Boston Bruins say defenseman Charlie McAvoy won’t be able to play for the United States in the championship game of the 4 Nations Face-Off on his home ice because of an undisclosed upper-body injury.

While Mike Sullivan discussed the loss of Charlie McAvoy, his alternate captain, son-in-law and impact defenseman, the coach of the United States was asked whether an extra defenseman might be on his way to Boston ahead of the 4 Nations Face-Off championship against Canada (8 p.m. ET; ESPN, ESPN+, Disney+, SN, TVAS) on Thursday.

What's best for country isn't always what's best for club, as made clear by this week's dance among the Canucks, Team USA and the NHL.

The Boston Bruins announced Wednesday that Charlie McAvoy underwent a procedure to deal with a shoulder injury.

Hughes was named to the U.S. roster in June but bowed out due to an oblique injury. He can't play unless another defenseman is unavailable.

The Boston Bruins provided an update Wednesday morning on the star defenseman, who got hurt during the Americans’ 4 Nations Face-Off opener.

Team USA said Quinn Hughes was flying to Boston to join them at least as emergency depth. But Hughes was still in Vancouver and unsure of his status.

BOSTON — The United States didn’t have to sacrifice much when looking for a replacement for injured defenseman Charlie ... McAvoy in the 4 Nations Face-Off final: Reigning Norris Trophy winner ...

BOSTON — The United States didn’t have to sacrifice much when looking for a replacement for injured defenseman Charlie ... McAvoy in the 4 Nations Face-Off final: Reigning Norris Trophy winner ...