A tragic event caused Jeremy Giambi's untimely passing, authorities confirmed.

The sports industry was shocked after Giambi's agent confirmed his passing on Wednesday, saying that the athlete died at his parents' home in Southern California. Joel Wolfe did not disclose further details about the event or mention his cause of death.

However, Daily Mail cited a website that reported he died from suicide.

A few days after the heartbreaking news came out, official autopsy reports finally confirmed Jeremy Giambi's cause of death.

The Los Angeles County Medical Examiner recently ruled that the former MLB star a suicide by gunshot to the chest. It was not until Friday when the office formally confirmed the report. No other contributing cause was included.

Before the autopsy report came out, Giambi's brother, Jason, told San Francisco Chronicles that the athlete had silent battles in the past years.

"I am completely shocked by the news about Jeremy. He was an incredibly loving human being with a very soft heart and it was evident to us as his teammates that he had some deeper battles going on," he said.

Colleagues Pay Tribute to Jeremy Giambi

People who were close to him immediately paid tribute as they remembered his life and legacy following his death.

Alex Rodriguez wrote, Bob Odenkirk Already Lost Pulse Following' Small Heart Attack' on 'Better Call Saul' Set "Heartbroken to hear the news about Jeremy Giambi's passing. He was the ultimate competitor on the diamond. Just 47, gone way too soon. My thoughts are with his family and friends. RIP."

"The entire Titans family is saddened to hear the news of Jeremy Giambi's passing. Our thoughts and prayers go out to the Giambi family," Titans Baseball said.

His former team, the Oakland Athletics, also penned a heartfelt message alongside a photo of him.

"We are heartbroken to learn of the passing of a member of our Green and Gold family, Jeremy Giambi. We offer our condolences to Jeanne, Jason, and his family and friends," the team wrote.

Giambi became part of the MLB for six seasons, playing with different teams from 1998 to 2003. He served as an outfielder and first baseman for several teams, including Kansas City Royals, Philadelphia Phillies, and Boston Red Sox.

He then played with his brother for A's during the 2000 and 2001 seasons.