Alexandrov, 22, has dressed in 16 games for the Blues this season, registering four points (two goals, two assists) and two penalty minutes. He has also appeared in 22 games for the Thunderbirds, posting 18 points (11 goals, seven assists) and 12 penalty minutes.
Alexandrov was originally drafted by the Blues in the second round (No. 62 overall) of the 2019 NHL Draft.