Charlie McAvoy and Mike Sullivan have a strong connection off the ice that goes way beyond hockey. McAvoy is married to Sullivan’s daughter Kiley, who recently gave birth to the couple’s first child.

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

Charlie McAvoy and Mike Sullivan have a strong connection off the ice that goes way beyond hockey. McAvoy is married to Sullivan’s daughter Kiley, who recently gave birth to the couple’s first child.

Charlie McAvoy and Mike Sullivan have a strong connection off the ice that goes way beyond hockey. McAvoy is married to Sullivan’s daughter Kiley, who recently gave birth to the couple’s

The 4 Nations Face-Off will mark the first time McAvoy will play for Sullivan, who he's known since he and Kiley met in college at Boston University. Sullivan also played hockey for BU before going on to an 11-season NHL career that included a stint with the Bruins (1997-98); he later coached them for two seasons from 2003-06.

Pittsburgh Penguins head coach Mike Sullivan is finally getting his chance to coach at the highest level of USA Hockey, as his team will take on Finland Thursday night to open its bid at the 4 Nations Face-off in Montreal.