The Heat made the announcement Friday, one day before opening a six-game homestand. He was injured in Miami's season-opening loss Wednesday at Orlando, a game in which he finished with 26 points and 22 rebounds.
Injuries are piling up for the Heat already. Small forward Rodney McGruder had surgery earlier this week for a stress fracture in his leg and is out indefinitely. And shooting guard Dion Waiters is still dealing with ankle sprains, an injury that ended his season early a year ago.
Going forward, Whiteside will be listed as day-to-day.