Semyonov was placed on unconditional waivers for the purpose of contract termination, Sportsnet's Chris Johnston reports.
Semyonov was reassigned to AHL Toronto on Monday, James Mirtle of The Athletic reports.
Semyonov was recalled from AHL Toronto on Sunday.
Semyonov was recalled from AHL Toronto on Sunday, per CapFriendly.
Semyonov was demoted to the minors Monday.
Semyonov signed a one-year, entry-level contract with the Maple Leafs on Wednesday, PuckPedia reports. The deal will begin with the 2021-22 season.