Throughout the year, the 40-year-old forward achieved a myriad of milestones. On Dec.12, 2019, Thornton became the 12th player in NHL history to appear in 1,600 NHL games. He recorded his 1,500th career NHL point and his 800th assist as a Shark on Feb. 4, 2020, becoming the 14th player in league history to achieve 1,500 points and the 15th player to collect 800 assists with a single franchise. Thornton additionally skated in his 1,100th career game in a Sharks sweater on Mar. 3, 2020.