John W. Henry is a successful businessman and sports team owner, best known for his ownership of the Boston Red Sox baseball team. Henry's involvement in baseball began in the 1990s when he purchased a minority stake in the New York Yankees. He later sold his stake in the Yankees and purchased the Florida Marlins in 1999.

Under Henry's ownership, the Marlins won the World Series in 2003, but he sold the team shortly after. In 2002, Henry and a group of investors purchased the Boston Red Sox, and he became the principal owner of the team. The Red Sox won their first World Series in 86 years in 2004, and went on to win two more championships in 2007 and 2013.

Henry is known for his analytical approach to baseball, using data and statistics to make decisions about player acquisitions and team strategy. He also implemented a new business model for the Red Sox, focusing on revenue streams beyond ticket sales, such as merchandise and media rights.

In addition to his ownership of the Red Sox, Henry also owns the Liverpool Football Club, a professional soccer team in England. He has been involved in several other business ventures, including a hedge fund and a financial trading company.

Overall, John W. Henry's baseball career has been marked by success and innovation. His ownership of the Red Sox has brought three championships to Boston, and his analytical approach to the game has influenced the way many teams operate.