Gregory John Kosc (born April 27, 1949) is a former umpire in Major League Baseball who worked in the American League from 1976 to 1999. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ He also worked the American League Championship Series in 1979, 1988 and
1993, and the American League Division Series in 1996 and 1997.<unk>1993, and the American League Division Series in 1996 and 1997. Kosc wore uniform number 18 when the American League umpires adopted them in 1980.