Luis Ernesto Aparicio Montiel, nicknamed "Little Louie", is a Venezuelan former professional baseball player. He played in Major League Baseball (MLB) as a shortstop from 1956 to 1973 for three American League (AL) teams, most prominently as a member of the Chicago White Sox. During his ten seasons with the team, he became known for his exceptional defensive and base-stealing skills. A 13-time All-Star,, he made an immediate impact with the team, winning the Rookie of the Year Award in 1956 after leading the league in stolen bases and leading AL shortstops in putouts and assists; he was the first Latin American player to win the award.
From 1956 to 1962, Aparicio and second baseman Nellie Fox formed one of the most revered double play duos in major league history.