John Hart is a former Major League Baseball executive who had a successful career as a general manager and team president. He began his career in baseball as a minor league player in the late 1960s, but his playing career was cut short due to injury. He then transitioned to coaching and scouting, eventually working his way up to become a general manager.

Hart's first stint as a general manager was with the Cleveland Indians in the early 1990s. He quickly turned the team around, leading them to five consecutive winning seasons and two World Series appearances. He was known for his ability to identify and develop young talent, and he built a strong farm system that produced several future All-Stars.

After leaving the Indians, Hart spent time as a television analyst before returning to the front office as the general manager of the Texas Rangers. He again had success in building a competitive team, leading the Rangers to three division titles in four years. He was also instrumental in the signing of international free agent Yu Darvish, who became one of the team's top pitchers.

Hart later served as the president of baseball operations for the Atlanta Braves, where he oversaw the team's rebuilding process. He made several key trades and signings that helped the Braves return to contention, including the acquisition of outfielder Justin Upton and the signing of pitcher Ervin Santana.

Throughout his career, Hart was known for his ability to evaluate talent and build successful teams. He was also respected for his leadership and his willingness to make tough decisions in order to improve his teams. He was inducted into the Texas Rangers Hall of Fame in 2007 and the Cleveland Indians Hall of Fame in 2016.

Overall, John Hart had a successful career in baseball as a player, coach, scout, and executive. He was instrumental in turning around several struggling franchises and building competitive teams. His legacy in baseball will be remembered for his ability to identify and develop young talent and his leadership in the front office.