More details surrounding former Major League Baseball player Scott Sauerbeck's death have been revealed -- the 53-year-old passed away of complications from the flu.
TMZ Sports obtained the autopsy report from the District 12 Medical Examiner's Office in Florida ... which listed "sequela of acute influenza A, including streptococcal pharyngitis" as the official cause of death.
Hypertensive heart disease was listed as a contributory factor ... and his manner of death was natural.
A toxicology report was conducted on Sauerbeck, which came back clean of any substances.