Sage Stallone Death Certificate

Still Waiting for Answers

7/23/2012 4:33 PM PDT BY TMZ STAFF
0723_sage_Stallone_Death_certificate_articleSage Stallone's cause of death is still a mystery ... this according to his official death certificate filed in L.A.

The death certificate lists Sage's C.O.D. as "deferred" -- which means the coroner is waiting for the results of various tests, including toxicology, before proclaiming what killed the 36-year-old.

The coroner notes that Sage's body was found on July 13 -- but does not specify a definitive date of death.

As we previously reported, people connected with the case believe Sage may have been dead for several days before his body was discovered by the housekeeper.