Halttunen scored three goals in AHL Belleville's 4-1 win over Toronto on Sunday.
Halttunen earned his second hat trick and fourth multi-point effort of the campaign. The 21-year-old winger is up to nine goals and three assists across 12 contests. The Senators have dealt with some forward injuries early in 2026-27 but look set to let Halttunen spend most of the campaign in the AHL before challenging for an NHL job next season.