Jeremy Giambi, a former MLB star who played for multiple baseball teams over the course of his career, reportedly died by suicide on Wednesday. The 47-year-old baseball player was found at his family home in California. An autopsy is pending, and an official cause of death has not been revealed.

According to TMZ, law enforcement sources say an emergency call was received at 11:40 a.m. on Wednesday that requested emergency assistance at his Claremont, CA home. By the time first responders arrived, however, Jeremy was pronounced dead by suicide.

Joel Wolfe, Jeremy Giambi’s agent, told reporters on Wednesday that the family requested, “that we all respect their privacy during this difficult time.”

Autopsy results are still pending, which will likely provide a clearer answer regarding what happened to the former MLB star. Reports that he took his own life have yet to be officially released, and the family has not given an official statement about his sudden passing.

Jeremy played for the Kansas City Royals, the Oakland Athletics, the Philadelphia Phillies, and the Boston Red Sox from 1998 to 2003. He was the younger brother of Jason Giambi, who also had a lengthy career in baseball for the Oakland Athletics and the New York Yankees and was a former MVP and five-time All-Star.

“We are heartbroken to learn of the passing of a member of our Green and Gold family, Jeremy Giambi,” the Oakland Athletics said in an official statement. “We offer our condolences to Jeanne, Jason, and his family and friends.”

He had a .263 career batting average, 209 RBIs, and 52 home runs over his six-year career.

“We mourn the loss of Jeremy Giambi, who spent six seasons in the major leagues, including 2003 with the Red Sox,” the Boston team wrote on Twitter. “We send our heartfelt condolences to the Giambi family.”

The Philadelphia Phillies also spoke out, writing that the team was, “saddened to hear the news about Jeremy Giambi’s tragic passing. Our condolences go out to his family during this difficult time.”

In 2011, Jeremy Giambi was portrayed by actor Nick Porrazzo in the Brad Pitt and Aaron Sorkin film Moneyball, based on the Michael Lewis non-fiction book of the same name. The story described the back-office moves made by the 2002 Oakland Athletics and their unorthodox methods for crafting a successful team on a small budget.

The scrappy Athletics, with Jeremy Giambi, go on to win their division that year, but lost in the opening round of the playoffs. Despite the loss, other teams around the league began to implement their statistical approach, such as the World Series winning Boston Red Sox in 2004.

Giambi, however, was traded from the Oakland Athletics to the Boston Red Sox after their breakout season and then retired in 2003, just one year short of the World Series title.

“Heartbroken to hear the news about Jeremy Giambi’s passing,” former New York Yankees third-baseman Alex Rodriguez wrote in a tribute online Wednesday. “He was the ultimate competitor on the diamond. Just 47, gone way too soon. My thoughts are with his family and friends. RIP.”

Both Jeremy Giambi and his brother Jason have admitted to using performance-enhancing drugs during the steroid crackdown in major league baseball. The two testified in the obstruction case against Barry Bonds, who was later stripped of all his titles and records.

“I apologize. I made a mistake,” he said in a 2005 interview. “I moved on. I kind of want it in the past.”