Bubba Smith died from an overdose of diet pills, according to the Los Angeles County Coroner report released Wednesday.
TMZ reported that the official coroner's report on Smith's Aug. 3 death listed "acute phentermine intoxication" as the first cause of death. Phentermine is a drug used to speed weight loss by suppressing appetite.
The former Baltimore Colts All-Pro, who became famous for roles in film, television and commercials after his career, was found dead this summer in his Los Angeles home. At the time, authorities believed the 66-year-old died of natural causes.
Smith was the first pick of the 1967 draft, won a Super Bowl with the Colts during the 1970 season and made an All-Pro team as a defensive end in 1971. He later appeared in the "Police Academy" movies and memorable advertisements from Miller Lite.