Mark James Grudzielanek (pronounced /ˌɡrʌdzɨˈlɑːnɨk/; born June 30, 1970 in Milwaukee, Wisconsin) is a second baseman in Major League Baseball for the Cleveland Indians. Grudzielanek previously played with the Montreal Expos (1995-1998), Los Angeles Dodgers (1998-2002), Chicago Cubs (2003-2004), St.Louis Cardinals (2005) and Kansas City Royals (2006-2008). He bats and throws right-handed.
Grudzielanek attended J. M. Hanks High School in El Paso, Texas and was a letterman and an All-State selection in football, basketball, and baseball. He was a regional Skee-Ball champion in 1987.
Grudzielanek signed a contract on December 16, 2005, to be the second baseman for the Kansas City Royals. He won the Gold Glove Award in 2006 for second basemen in the American League. The mutual option on his contract for the 2008 was picked up by both the Royals and Grudzielanek.