McAvoy is married to Sullivan’s daughter Kiley, who recently gave birth to the couple’s first child. McAvoy plays defense for the Boston Bruins, Sullivan coaches the Pittsburgh Penguins and their careers had not overlapped until now, when they’re on the same team with the United States at the 4 Nations Face-Off.

These fall into the category of friendly fire delivered in the friendly confines of the locker room.

As Team USA gears up for the 4 Nations Face-Off championship vs. Canada, Bruins defenseman Charlie McAvoy will not be taking the ice. He joins a list of injured players that already includes Auston Matthews and brothers Matthew and Brady Tkachuk.