Clutterbuck (COVID-19 protocols) was in attendance for Thursday's practice session after clearing the NHL's protocols.
Even with Clutterbuck and Matt Martin available to play against the Sabres on Thursday, the Isles will likely need to add a couple of forwards to the active roster. On the year, the 34-year-old Clutterbuck has notched five goals in 26 contests and could push for the 20-point threshold for the seventh time in his NHL career.