Pat Riley believes Chris Bosh's latest health setback has apparently convinced the Miami Heat that a return from multiple bouts of blood clots is no longer feasible.

Riley told reporters Monday that Bosh's "Heat career is probably over" and that the team is not actively working toward his return.

"There is not a next step for us," Riley said. "It's pretty definitive for us in our position."

Riley was asked if Bosh's career in the NBA is over.

"That's up to him," replied Riley.

The Heat declined to explain why Bosh failed the physical and cited a clause in the collective bargaining agreement that prohibits the team from releasing certain medical information.