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According to a press release:
Dr. Schiller...serves as President of the International Baseball Federation, the global governing body for the sport of baseball. Previously, Dr. Schiller served as Chairman and C.E.O. of Yankees/Nets; President of Turner Sports, Inc.; Executive Director and Secretary General of the United States Olympic Committee and Commissioner of the Southeastern Conference.
Citadel Sports has a great in depth article on Dr. Shiller and his accomplishments throughout his career.