Tennyson was placed on injured reserve Thursday due to an upper-body injury.
Tennyson left Tuesday's game against the Golden Knight after logging just 3:23 of ice time. The blueliner is stuck in a 15-game pointless streak and served as a healthy scratch in three games along the way. Mirco Mueller figures to slot into the lineup in Tennyson's absence, though Connor Carrick (finger) could also be an option soon.