Brooks Calbert Robinson Jr. was an American baseball player who played his entire 23 seasons in Major League Baseball as third baseman for the Baltimore Orioles from 1955 to 1977. Nicknamed "Mr. Hoover" and "the Human Vacuum Cleaner", he is generally considered to have been the greatest defensive third baseman in major league history. An 18-time All-Star, he won 16 consecutive Gold Glove Awards, the most by a position player, and tied with Jim Kaat for the second-most of all-time, behind Greg Maddux. His 2,870 career games at third base not only exceeded the closest player by nearly 700 games when he retired, but also remain the most games by any player in major league history at a single position. His 23 seasons spent with a single team set a major league record since matched only by Carl Yastrzemski.

A third baseman, abbreviated 3B, is the player in baseball or softball whose responsibility is to defend the area nearest to third base — the third of four bases a baserunner must touch in succession to score a run. In the scoring system used to record defensive plays, the third baseman is assigned the number 5.