Seaport Shedding Company That Includes Yankees Farm Club

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Seaport Capital LLC, which includes a majority stake in Mandalay Baseball Properties, is selling its share of the holding company that owns five minor-league baseball teams, including half of the New York Yankees’ Triple-A affiliate.

Seaport, based in New York, has retained Game Plan LLC to sell the holding company, said Bob Caporale, the Boston-based firm’s chairman.