Ellis was a third-round pick, 93rd overall, of the Blues in the 2019 NHL Entry Draft. The 24-year-old goalie has yet to play an NHL game but has had an impressive season in the AHL, posting a 2.41 GAA and .926 SV% in 31 games (19-7-3) with the Springfield Thunderbirds.

St. Louis has secured their goaltending tandem in Springfield (AHL) for the 2024-25 season after they re-signed Colten Ellis to a one-year, two-way contract extension on Tuesday. The 23-year-old netminder was St. Louis' 2019 third-round pick (93rd overall) and was sensational in 2023-24, posting a .923+ SV% in both the ECHL with Orlando (21 games) and AHL with Springfield (16 games).