The procedure, performed Wednesday at the Hospital for Special Surgery and considered successful, will require five months of recovery and rehabilitation. Sims, 24, is expected to be prepared for the start of training camp in September, the Knicks said.
Sims found an increasingly sizable role through the middle of the Knicks' regular season. New York was 15-11 in games in which Sims played more than 15 minutes.
He was the 53rd overall pick to the Knicks in the 2021 NBA draft, elevating himself from a two-way contract to a standard NBA deal in the past season.
Sims has been out of the Knicks' rotation since April 7 with the shoulder injury. For the season, Sims averaged 3.4 points -- on 78% shooting -- and 4.7 rebounds in 15.6 minutes per game.