Douglas Andrew Mientkiewicz (pronounced /mɪntˈkeɪvɪtʃ/ mint-KAY-vich (born June 19, 1974 in Toledo, Ohio) is a Major League Baseball first baseman for the Los Angeles Dodgers.

He is known more for his defensive skills than for his abilities with the bat. He previously played for the Minnesota Twins (1998-2004), Boston Red Sox (2004), New York Mets (2005), Kansas City Royals (2006), New York Yankees (2007), and the Pittsburgh Pirates (2008).

Mientkiewicz was on the U.S. Olympic team when they won the gold medal at the 2000 games in Sydney, hitting the game-winning home run against South Korea in the semi-finals.