Lilleberg was reassigned to AHL Syracuse on Tuesday.
Lilleberg will join up with the Crunch, who are tied 1-1 in a best-of-five series against AHL Rochester. At the NHL level this season, the 23-year-old blueliner played in 37 regular-season games in which he tallied five helpers, 105 hits and 31 shots, though he is still looking for his first NHL goal.