On November 16, 2019, Stamkos recorded his 400th career NHL goal in a 3–4 loss to the Winnipeg Jets at Amalie Arena. Stamkos became the first player in Lightning history to score 400 goals with the franchise. On December 7, 2019, Stamkos recorded his 150th and 151st NHL power-play goal in a 7–1 Lightning win over the visiting San Jose Sharks at Amalie Arena. In doing so, Stamkos became the 4th player in NHL history that played primarily as a center to record 150+ career power-play goals before the age of 30. On December 28, 2019, Stamkos recorded his 800th career NHL point. Stamkos became the third player in Lightning history to record 800 points with the franchise. On January 9, 2020, Stamkos recorded his 400th career NHL assist. Stamkos became the third player in Lightning history to reach the milestone. On January 24, 2020, Stamkos was named to the NHL's 2010s All-Decade Second Team. In that decade Stamkos recorded 731 points over 672 games. On February 4, 2020, Stamkos recorded his 61st game-winning goal of his career. The goal moved him past Vincent Lecavalier for second most game-winning goals in Lightning history. On February 17, 2020, Stamkos skated in his 800th career NHL game. Stamkos joined St. Louis and Lecavalier as the only players in franchise history to play in 800 career games.