Jarnkrok (lower body) will be in the lineup versus Detroit on Thursday.
Jarnkrok played in 52 regular-season contests for the Leafs last season in which he registered 10 goals, 11 assists and 92 shots while averaging 15:16 of ice time. Barring any setbacks, the 33-year-old Swede appears set to fill a top-six role for Toronto, which could see him challenge for the 40-point threshold for the first time in his career.