Krug (undisclosed) didn't participate in Monday's morning skate and is a game-time decision for the evening's game against the Avalanche, Jeremy Rutherford of The Athletic reports.

EDGE Analysis

The Blues could ill-afford to have Krug sit out considering Vince Dunn and Colton Parayko have both been ruled out with upper-body injuries. Even if Krug plays, St. Louis' defensive depth will be tested against an Avalanche team that will be out for revenge after Saturday's loss.