Sage Stallone was found dead yesterday in his LA apartment. Sage, whose father is Sylvester Stallone, is believed to have died of a prescription drug addiction. Reports are now saying that Sage was dead for at least three days before his body was discovered! His housekeeper found his body after Sage’s mom called her to check on him. Sage was very too himself and would often spend days in his room, which the housekeeper was never allowed in and wouldn’t even knock on the door to. Read more below. Julie1205