Thornton (ribs) will be in action versus Ottawa on Monday, Sportsnet's Chris Johnston reports.
EDGE Analysis
Thornton is set to return from a 10-game absence due to his fractured rib but will need to be officially activated off injured reserve prior to puck drop. The 41-year-old veteran is poised to slot into a top-six role, which will have him playing with some of the Leafs' young stars.