Hartman notched two assists, two shots on goal, three blocked shots and a plus-2 rating in Friday's 5-1 win over the Blues in game 3.
Hartman set up Kirill Kaprizov at 2:18 of the first period and Jonas Brodin on an empty-netter in the third. This was Hartman's second straight two-assist game. The 27-year-old continues to find success in a top-line role in the playoffs after posting 34 goals and 31 helpers in 82 regular-season contests.