McCormick became the odd-man out Wednesday because Ruff said the team has enough toughness already. He added a decision hasn't been made on how the Sabres will fill the roster spot before their game at Toronto on Thursday.
Ruff then cut short his availability with reporters after suggesting more changes could be on the horizon because "it isn't working the way we're going." He didn't specify what those changes might be.
The Sabres (6-10-1) are in the midst of a 4-10-1 slump following a 2-1 loss to Winnipeg on Tuesday.
McCormick, an eight-year NHL veteran, had no points in eight games this season.