The Ducks announced Silfverberg's injury Saturday, saying the Swedish forward will be out 4-6 weeks. Silfverberg was slashed by Cowen midway through the third period Friday night.
Silfverberg is off to an outstanding start to his first season in Anaheim, with four goals and three assists in his first seven games. The Ducks acquired Silfverberg in an off-season trade with the Senators for forward Bobby Ryan.
Ducks forward Dustin Penner will rejoin the team before Sunday's game at Columbus. Penner has missed the first three games of Anaheim's trip after taking a hard hit from Dallas forward Ryan Garbutt, who was suspended for five games.