Joel Embiid has suffered a stress fracture in his right foot and will have surgery Friday, agent Arn Tellem said.
The stress fracture is in the navicular bone of the Kansas center's right foot.
"Joel will be unable to participate in any additional workouts and will not attend the draft in New York," Tellem said.
Recovery time from the injury will be clearer after Embiid's surgery on Friday, Tellem told Yahoo Sports via text message.
Embiid, the projected No. 1 overall pick, consulted with renowned orthopedist Dr. Richard Ferkel on the injury, which sources believe happened over a week ago. Along with a back injury that caused Embiid to miss the last six games during his one college season, it becomes increasingly unlikely that Embiid will still be Cleveland's choice as the No. 1 overall pick.
Suddenly, Duke's Jabari Parker and Kansas' Andrew Wiggins become serious considerations for Cleveland in the top spot of June 26's draft. Draftexpress.com believes Embiid could drop to the Orlando Magic with the fourth overall pick.
Embiid's injury was discovered in a physical Cavs doctors conducted during a recent trip to Cleveland, sources told Yahoo Sports. As part of an agreement, Milwaukee performed the physical on Parker, and Cleveland conducted Embiid's – and the two teams exchanged them.
Milwaukee officials didn't learn of Embiid's injury until Thursday morning, league sources said.
Philadelphia has been intrigued with the possibility of drafting a point guard with one of its picks in the draft, closely studying Dante Exum and Marcus Smart, sources said. Smart wouldn't be selected with Philly's third overall pick, sources said, but Exum does become a candidate for the Sixers at No. 3. Philadelphia has had discussions with teams about gathering an additional pick between its two current choices at No. 3 and No. 10.
In recent days, Cleveland had inquired about the possibility of setting up a workout for Exum, sources said.