PHILADELPHIA — Former major leaguer and baseball commentator John Marzano was intoxicated when he fell down the stairs and died in his home, the medical examiner’s office said Thursday.

The cause of Marzano’s death was determined as “postural asphyxia contributed to by blunt trauma and ethanol intoxication,” said Jeff Moran, spokesman for the medical examiner’s office. Moran said he could not elaborate.

Marzano, known as “Johnny Marz,” died in April at the age of 45. He was from Philadelphia and had been working for Major League Baseball’s Web site, where he co-hosted a show on weekday mornings.