Mark Eugene Grace (born June 28, 1964) is a former Major League Baseball first baseman for 16 seasons with the Chicago Cubs and Arizona Diamondbacks. He won the 2001 World Series with the Diamondbacks, beating the New York Yankees. He batted left-handed. He wore jersey number 28 and 17 during his rookie season in 1988, and he kept number 17 for the remainder of his career. Grace retired with a .303 batting average and a .383 career on-base percentage, the 148th best in major league history.

Grace played high school baseball and basketball at Tustin High School in Tustin, California.

After playing baseball for San Diego State University, Grace was drafted by the Chicago Cubs in 1985. He spent three years playing in the Cubs farm system before making his major league debut May 2, 1988.

Grace starred on Cubs teams that included Ryne Sandberg, Andre Dawson and Sammy Sosa and was a consistent, steady hitter, compiling almost 2,500 hits and more than 500 doubles during his 16-year career and for a few years batted clean-up for the Cubs. He had a career on-base percentage of .383 and collected four Gold Glove Awards and was a three-time All-Star (1993, 1995, 1997). He holds the distinction of hitting more hits in the 1990s than anyone else.

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