The Timberwolves have avoided significant injuries as they have navigated their way to the No. 1 seed in the Western Conference.
That changed Thursday night when sources confirmed Karl-Anthony Towns will have surgery to repair a torn meniscus in his left knee. He will be re-evaluated in four weeks.
The team listed Towns as out for Thursday's game in Indianapolis because of left knee soreness. Towns missed significant time last season because of a right calf injury that sidelined him from late November until late March, and he played in just 29 regular-season games.
Towns earned his fourth All-Star appearance this season thanks in part to his offensive efficiency.