Kammala jumla mai zuwa: Gregory John Kosc (an haife shi a ranar 27 ga Afrilu, 1949) tsohon alƙali ne a Major League Baseball wanda ya yi aiki a Ƙasar Amirka daga 1976 zuwa 1999. Ya yi hukunci a Wasannin Duniya a 1987 da 1997, kuma a Wasannin All-Star a 1981 da 1992. Ya kuma yi aiki a gasar zakarun Amurka a 1979, 1988 da kuma
1993, da kuma Ƙungiyar Ƙungiyar Ƙasar Amirka a 1996 da 1997. Kosc ya sa rigar lamba 18 lokacin da alkalin wasannin Amurka ya karbe su a shekarar 1980.