Blais played in 32 regular-season games for the Blues in 2018-19, posting two goals and two assists (four points). The 23-year-old forward made his debut in the Stanley Cup Playoffs in Game 6 of the Blues' second-round series against the Dallas Stars, scoring in a must-win game for St. Louis.
Blais eventually recorded one goal and two assists (three points) in 15 playoff games this season, helping the Blues to their first Stanley Cup title in franchise history.
Overall, Blais has three goals and four assists (seven points) in 43 career NHL regular-season games.