Blackwood was reassigned to AHL Binghamton on Friday.
Blackwood was called up as relief for Cory Schneider and Keith Kinkaid, as they're both dealing with groin ailments. The 21-year-old backstop has struggled for AHL Binghamton this season, with an .877 save percentage, 3.64 GAA and 5-12-0 record. If either Schneider of Kinkaid can get healthy for a Jan. 30 matchup against the Sabres, Blackwood likely won't be called up again.