Harold W. O'Shaughnessy is a former executive in Major League Baseball, beginning his career in 1980 as Comptroller.

Harold served in multiple vice president positions such as Vice President, Comptroller from 1981 to 1985; Vice President of Finance & Administration in 1985; served as Vice President/Treasurer from 1986 to 1993; and was made Senior Vice President/Treasurer in 1994, serving in that capacity until 2002.

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