Mark Andrew Kiefer (born November 13, 1968) is a former Major League Baseball pitcher.

He played in parts of four seasons in the majors, from 1993 until 1996, for the Milwaukee Brewers.

He also played for four years in the Chinese Professional Baseball League for the Sinon Bulls and three years in the KBO League for the Kia Tigers and the Doosan Bears.

Mark Kiefer is a scout for the Chicago Cubs (MLB) and was a part of the team that won the World Series in 2016.

This biographical article relating to an American baseball pitcher born in the 1960s is a stub.