Clifford, 30, was signed by the Blues as a free agent on Oct. 11, 2020. The 6-foot-2, 214-pound forward appeared in 52 regular-season games with the team, collecting eight points (four goals, four assists) and 30 penalty minutes.
Overall, the Ayr, Ontario, native has amassed 140 points (65 goals, 75 assists) and 872 penalty minutes in 728 career NHL regular-season games.