George Howard Brett is an American former professional baseball third baseman who played 21 seasons in Major League Baseball (MLB) for the Kansas City Royals.

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.