The deal is worth $700,000 at the NHL level and $80,000 at the AHL level.
Stevens has played the last two seasons with the San Antonio Rampage. In 2019-20, he played in 50 games, recording nine goals and 22 assists (31 points). Before turning pro, Stevens played four seasons at Northeastern University, recording 57 goals and 61 assists (118 points).
Stevens was drafted by the Blues in the fifth round (No. 125 overall) at the 2016 NHL Draft.