Merilainen spent most of the 2024-25 campaign in the AHL, but was thrust into NHL action due to recurring injuries to Ottawa's goaltenders. The 22-year-old Merilainen, a third-round pick in the 2020 NHL Entry Draft, was excellent when called upon for Ottawa, posting a 1.99 GAA and .925 SV% in 12 outings (8-3-1). He had a 2.37 GAA and .913 SV% in 37 games (18-12-4) with the Belleville Senators (AHL).
