John Hart is the former President of Baseball Operations for the Atlanta Braves. In addition, he was the General Manager of the Cleveland Indians (1991 – 2001), winning six of seven American League titles with two World Series appearances. He also served as the General Manager at the Texas Rangers (2001 – 2005). From 2009 through 2014 he was a studio analyst for the MLB Network before moving into his current role with the Atlanta Braves.
To learn more about John: https://en.wikipedia.org/wiki/John_Hart_(baseball)