Tucker, 21, was originally drafted by the Blues in the seventh round (No. 200 overall) of the 2018 NHL Draft.
This season, the 6-foot-2, 205-pound defenseman has appeared in 27 games with the Comets, collecting seven points (one goal, six assists) and 34 penalty minutes. The Thunder Bay, Ontario native spent the majority of his junior career with the Barrie Colts and totaled 152 points (35 goals, 117 assists) and 330 penalty minutes in 244 career Ontario Hockey League (OHL) games overall.