TMZ Sports has obtained Roy Halladay's autopsy report -- in which the coroner lists the cause of death as blunt trauma and drowning ... but points out the MLB star had morphine in his system.
The 40-year-old died in a single passenger plane crash in the Gulf of Mexico back in November. As we previously reported, Halladay was flying in an erratic pattern shortly before the crash.
The toxicology results show Halladay had zolpidem (the generic name for Ambien), as well as morphine in his system at the time of the crash.