The body of Smith, 66, was found Aug. 3 at his Baldwin Hills, Calif., home by a caretaker. According to the autopsy, he had phentermine, a weight-loss drug, in his system and also suffered from heart disease and high-blood pressure.
His heart was nearly twice the size of a normal heart and he had 75 percent blockages in some vessels, the report indicated.
Smith was an All-American defensive end for Michigan State and was the No. 1 draft pick by the Baltimore Colts in 1967. He was a member of the Colts team that lost to the New York Jets in Super Bowl III and the team that beat the Dallas Cowboys in Super Bowl V. He played two seasons each for the Oakland Raiders and Houston Oilers.
He went into acting after a knee injury ended his career in 1976.
In addition to Miller Lite ads, he starred as Moses Hightower in “Police Academy” movies and was in several TV series.