LeBron James has become a partner in the Fenway Sports Group, making the NBA superstar a part owner of the Boston Red Sox, a source has confirmed to ESPN.

The Boston Globe first reported Tuesday that James and Maverick Carter — his longtime friend and business partner — are now partners at Fenway Sports Group (FSG).

James and Carter own an undisclosed amount of ownership shares of FSG, according to the Globe. The Los Angeles Lakers star and four-time NBA MVP also will become a partial owner of other FSG subsidiaries, including NASCAR team Roush Fenway Racing, sports cable network NESN and Fenway Sports Management.

James, 36, previously held a 2% ownership stake in British soccer club Liverpool, the defending EPL champion, which also falls under FSG ownership.