Heart goes out to Sylvester Stallone. Yahoo news reported that his son, 36 year old, Sage Stallone has been found dead in a Studio City home. As we know Silvester Stallone is set to release an all-star cast in Expendables 2. Authorities still aren’t sure what caused his death and aren’t suggesting anything as yet. There were no suicide notes found, yahoo news reports, but there were prescription bottles found. The exact prescriptions were not released by the authorities.