It was on Friday afternoon when Sage, who starred alongside his father in Rocky V, was found dead in his Los Angeles home.

"Sage was our first child and the center of our universe and I am humbly begging for all to have my son's memory and soul left in peace," Stallone concluded.

Following Sage's passing, Ed Winter of the Los Angeles coroner's office said prescription bottles were recovered in the investigation, but did not say what the bottles contained, or whether they had a role in Sage's death.