Torres had the operation Thursday and general manager Doug Wilson says he is expected back later this season.
Torres was injured in a collision with Anaheim forward Emerson Etem last Friday.
The Sharks were counting on Torres to provide energy and physical play this year. His acquisition late last season provided a needed spark to the team before he was suspended for the final six playoff games for an illegal hit on Los Angeles forward Jarret Stoll.
The Sharks signed Torres to a three-year, $6 million contract in June.
After being through it and seeing the other [outdoor] games on TV, just the atmosphere is spectacular. To stand here -- and we are essentially almost on the blue line -- and look up [into the stands] and knowing it is going to be packed and playing our biggest rival in this setting is going to be pretty special.
— Bruins president Cam Neely on the 2016 Bridgestone NHL Winter Classic between Boston and Montreal at Gillette Stadium on
Jan. 1, 2016