The Montreal Canadiens are going to be without two forwards, including one of their top scorers, for the foreseeable future.
Meanwhile, Paul Byron will have a procedure performed on his knee, Canadiens head coach Claude Julien confirmed earlier Monday. Byron will be out indefinitely, Julien added, according to The Athletic's Arpon Basu.
Drouin and Byron were both hurt in Friday's win over the Washington Capitals.
The Canadiens placed Drouin on injured reserve Sunday. He's tied for second on the team in goals (seven) and is tied for fourth in points (15) through 19 games.
Byron has chipped in four points in 19 contests of his own.