Zherenko, a 2019 seventh-round pick, has yet to make his NHL debut but is 10-8-3 with a 2.96 goals-against average and a .918 save-percentage with the Thunderbirds this season.
Zherenko is expected to serve as the backup to Jordan Binnington in Thursday's regular-season finale in Dallas.
Hofer appeared in six games with the Blues in the 2022-23 season, posting a 3-1-1 record with a 3.22 goals-against average and .905 save-percentage. In Springfield this season, Hofer is 25-15-5 with a 2.57 goals-against average, a .918 save-percentage and four shutouts.