Stamkos scored the game-winner on the power play and added an even-strength assist in Tuesday's 3-1 win over the Canadiens.
Stamkos scored a goal and three assists for Tampa in a 7-3 win over Toronto on Thursday.
Stamkos scored in Saturday's 4-3 loss to the Panthers.
Stamkos enters the season seven goals from 400 in his NHL career.
Stamkos scored an even-strength goal and added a power-play assist in Tuesday's 7-3 loss to the Blue Jackets in Game 4 of their first-round series.
Stamkos has been held without a point through two games in the Lightning's first-round series against the Blue Jackets.
Stamkos was not pleased with the Lightning's collapse in Game 1 against Columbus and is expecting "a much better game" Friday.
Stamkos scored his 45th goal of the season in Saturday's 6-3 win over the Bruins. It came shorthanded.
Stamkos scored a shorthanded goal and added an assist in Thursday's 3-1 win over Toronto.
Stamkos lit the lamp in Tuesday's loss to the Canadiens.