Jarnkrok didn't practice Tuesday and is day-to-day with a lower-body injury, according to Mark Masters of TSN.
Jarnkrok logged just 12:28 of ice time in Sunday's 6-5 overtime loss to Ottawa in exhibition action. In 52 regular-season appearances, he generated 10 goals and 21 points in 2023-24. Once healthy, Jarnkrok will occupy a middle-six role for the Maple Leafs.