Senators' D Bleeding - Who's Next Up?

Ottawa's blue line takes a third hit, forcing the coaching staff to scramble for bodies who can handle top-four minutes on the fly. GMs around the league track these injury piles, wondering if it's time for a call-up or a deadline deal to steady the ship. With the standings unforgiving, the Sens brain trust weighs depth chart gambles that could define their season's second half.