If you watched only the final two periods of the game between the Calgary Flames and the Montreal Canadiens, you could be excused for not realizing Nicolas Deslauriers was dressed.
Deslauriers played only five shifts in the final two periods, and his even strength ice time in those 40 minutes was only 2:04. He went just about 15 minutes of game time in the second and third periods without getting a single shift.
He didn’t do anything wrong to earn his time on the bench, he, I assume, just didn’t have the confidence of head coach Claude Julien.