Stamkos has been recovering from a lower abdominal core muscle injury which he suffered prior to the NHL's return to play. The 30-year-old returned for Game 3 of the Stanley Cup Final against the Dallas Stars, but played just 2:47 -- all in the first period -- and scored a goal in his team's win.
Stamkos ranked second on the Lightning with 29 goals and 66 points in 57 regular-season games. Tampa Bay will be without star forward Nikita Kucherov who had hip surgery and will miss the 2020-21 regular season.
The Lightning open the upcoming season at home against the Chicago Blackhawks on opening night.