Former MLB player Jeremy Giambi died by a self-inflicted gunshot wound ... according to the medical examiner in Los Angeles.
He was only 47-years-old.
As we previously reported, sources told us it was evident the former 7 year Major League Baseball vet took his own life earlier this week at his parents home in the Los Angeles area.
We're told a family member found Jeremy around 11:40 AM on Wednesday ... and immediately dialed 911. Rescuers responded, but sadly, there was nothing they could do to help Giambi.