Brewer needed the surgery to repair a medial meniscus tear in his left knee, an injury that occurred sometime in the last two weeks, according to the team. He will probably miss the first three weeks of training camp, as well as the Knicks’ first three preseason games. N.B.A. camps open on Oct. 2.
If Brewer returns after six weeks, he would have about 12 days to get ready for the Nov. 1 season opener and would perhaps be able to play in the final two preseason games.
The Knicks are hoping that the defensive-minded Brewer can fill in as the starter until Iman Shumpert returns from knee surgery sometime in January. Coach Mike Woodson would prefer to keep J.R. Smith, a more potent scorer, as his sixth man. Beyond Brewer and Smith, the Knicks have few options at shooting guard.
Brewer, 27, signed with the Knicks in July, after two seasons with the Chicago Bulls. He averaged 6.9 points in 66 games for Chicago last season, including 43 as the starter.