Halonen has been assigned to AHL Utica by the Devils, the team announced Sunday.
Cody Glass (upper body) returned Thursday against the Canadiens and Connor Brown (upper body) is day-to-day and inching closer to a return, so Halonen's services are no longer required at the NHL level. The 26-year-old Halonen made the most of his time with the big club, scoring his first NHL goal, but that was his only point in nine appearances so far this year.