Grzelyck (upper body) could miss multiple weeks, Elliotte Friedman of Sportsnet reports.

EDGE Analysis

Grzelyck was injured Monday against Florida, and it's not a great sign that head coach Jim Montgomery is already expecting him to miss extended time. Grzelyck will likely undergo further testing Tuesday to get a better look at his timeline. The Bruins will need to promote some reinforcements to fill in on the blue line, as they currently don't have a seventh defenseman on the roster.