Dr. Neal ElAttrache will perform the surgery, which team trainer Sue Falsone called "a simple cleanup procedure."
Falsone said wear and tear and degeneration caused the need for the surgery, but she was optimistic it wouldn't need any major repair. She said Lilly can start throwing in a few months and he should be ready for Spring Training.
Lilly, who was 5-1 with a 3.14 ERA in eight starts before going down, is signed through 2013 after agreeing to a three-year, $33 million deal in 2010. He has been out since May 24 with left shoulder inflammation, and back pain stalled any sort of comeback as a reliever for September. The team held off surgery as long as possible, but it got to a point where it was too late for Lilly to return.
The 36-year-old starter previously underwent arthroscopic surgery on his left shoulder in November 2009.
Another injured Dodgers starter, Chad Billingsley, who has a partial tear of his ulnar collateral ligament in his right elbow, is doing significantly better, Falsone said. The team will wait another week before he starts tossing and then go "extremely slow" with his progression.