Mark Hirschbeck
Mark Hirschbeck is an American former umpire in Major League Baseball who worked in the National League from to, and both Major Leagues from until his retirement in.
Career
He wore uniform number 4 throughout his NL career, but changed to 20 when the umpiring staffs unified in 2000. His brother John is also a major league umpire, making the Hirschbecks the first pair of brothers to umpire in the Major Leagues at the same time.Mark Hirschbeck's assignments included the National League Division Series|1997], 1999 and 2002 National League Division Series, the 2001 [American League Division Series], the 1996 National League [Championship Series|1996 NLCS], the 2000 ALCS, and the 1998 and 2001 World Series. Hirschbeck also officiated the 1993 [Major League Baseball All-Star Game|1993] and 2000 [Major League Baseball All-Star Game|2000] All-Star Games.