Robert Pershing Doerr was an American professional baseball second baseman and coach. He played his entire 14-year Major League Baseball (MLB) career for the Boston Red Sox (1937–1951). A nine-time MLB All-Star, Doerr batted over .300 three times, drove in more than 100 runs six times, and set Red Sox team records in several statistical categories despite missing one season due to military service during World War II. He was inducted into the Baseball Hall of Fame in 1986.

In baseball and softball, second baseman, abbreviated 2B, is a fielding position in the infield, between second and first base. The second baseman often possesses quick hands and feet, needs the ability to get rid of the ball quickly, and must be able to make the pivot on a double play. In addition, second basemen are usually right-handed; only four left-handed throwing players have ever played second base in Major League Baseball since 1950. In the numbering system used to record defensive plays, the second baseman is assigned the number 4.