Boucher was placed on waivers by the Senators on Sunday, Bruce Garrioch of Postmedia reports.
Boucher signed a one-year, two-way contract to remain with the Senators during the offseason, and he'll be left off the team's Opening Night roster once again. The 2021 first-round pick hasn't yet made his NHL debut, but he logged 12 goals, 14 assists and 68 PIM across 47 regular-season appearances with AHL Belleville during the 2025-26 campaign.