Sylvester Stallone’s 36-year-old son Sage died Friday of an apparent drug overdose. Sources tell TMZ that Sage, Sly’s first child with ex-wife Sasha Czack, was found at his Los Angeles apartment and paramedics pronounced him dead at the scene. “Sylvester Stallone is devastated and grief-stricken over the sudden loss of his son Sage Stallone,” read a statement from the actor’s rep “His compassion and thoughts are with Sage's mother, Sasha.  Sage was a very talented and wonderful young man.  His loss will be felt forever." Like his dad, Sage became an actor, and appeared as Rocky Balboa’s son in 1990’s Rocky V.  TMZ claimed it was possible Sage had been dead for three to four days before his body was discovered, but Sage’s lawyer believes that’s not possible, especially since photos of Sly’s son were posted to his Facebook account only 17 hours before he was found. But cops tell TMZ he was dead a minimum of three days, and no one had heard from him in at least a week. An autopsy on Sage was performed Sunday. Results are not expected back for four to five weeks.