LeBron James has become a partner in Fenway Sports Group. That makes the Lakers star a part-owner of the Boston Red Sox. The Boston Globe first reported the deal. Fenway Sports Group is the parent company of the Red Sox as well as the Liverpool Football Club of the English Premier League and the Roush Fenway Racing NASCAR team. James has had a relationship with FSG since 2011, when he signed a marketing deal in exchange for an ownership stake in Liverpool.