It wasn't specified whether Flacco will have both knee ligaments surgically repaired or if it will only be his anterior cruciate ligament. He suffered the season-ending injury on the last drive against the St. Louis Rams on Nov. 22 and played the final three plays on the injured knee.
Flacco had to wait until the swelling went down before doctors could operate. The surgery will be performed by renowned surgeon Dr. James Andrews in Alabama.
The recovery period for ACL reconstruction is generally six to nine months. The Ravens have previously expressed optimism that Flacco will be ready at the start of training camp.
Last week, Flacco addressed the injury on Facebook, saying, "I also want to let everyone know that I am doing well and with help from modern medicine, combined with old-fashioned hard work, I should be good as new."