What is a 4-6-3 double play?

A 4-6-3 double play is a common defensive play in baseball. It involves the second baseman, shortstop, and first baseman working together to retire two opposing players. The play begins when a ground ball is hit to the second baseman, who fields the ball and quickly throws it to the shortstop to get the lead runner out at second base (the "4" position). The shortstop then throws the ball to the first baseman to get the batter out (the "3" position), resulting in a double play. The 4-6-3 double play is often referred to as a "twin killing." This play requires quick reflexes, good coordination, and accurate throws by all three players involved.