Berube was originally named Interim Head Coach on Nov. 19, 2018, replacing Mike Yeo behind the bench. On Jan. 1 of that season, the team was in last place in the standings but went 30-10-15 to become just the seventh team since 1967-68 to earn a postseason berth after being in last place at any point after New Year's Day.
The team continued its success in the playoffs, capping off the season with a win in Game 7 of the Stanley Cup Final to secure a championship.
Berube finished that season as a finalist for the Jack Adams Award as the League's top coach.
"I came in here four years ago and we've had great success here," Berube said. "We have a chance to win again. I think that Doug does everything he can to put a winning team on the ice, and as a coach, I think that's a great thing.
"I really enjoy St. Louis. I enjoy the fan base, and it's a great organization."
Currently, Berube ranks seventh in Blues history in games coached (234), fourth in wins (133). His points percentage (.632) ranks second.