Melanson's upper-body injury was diagnosed Saturday as an anterior mediastinum hematoma with vascular pseudo aneurysm. He will continue to be evaluated and is out indefinitely.
The Kraken said that there would be a "gradual progression to return to hockey," so Melanson shouldn't be expected to play for a while. The 23-year-old suffered the injury in Seattle's Season Opener against Calgary on Oct. 1. Melanson had two goals and five points in 36 regular-season outings with the Kraken in 2025-26.