6-4-3 double play
A common combination resulting in a double play: A runner is on first base and a ground ball is batted to the shortstop (numbered 6 in scorekeeping). He throws to the second baseman (4) who steps on second base to force out the runner from first, then throws to the first baseman (3) standing on first base to force out the batter. A famous infield trio for the Chicago Cubs is remembered by this sequence: "Tinker to Evers to Chance." A similar combination is the 4-6-3 double play.
