Infielders are baseball players who occupy positions within the infield, which is the area of the field closest to home plate. The main infield positions include first baseman, second baseman, shortstop, and third baseman. Their primary responsibilities involve fielding ground balls, catching line drives, and making quick throws to get runners out. Infielders play a crucial role in defense, working together to prevent runs and turn double plays. They must have strong throwing arms, quick reflexes, and good communication skills to coordinate with each other and the pitcher. Their performance can significantly impact the outcome of a game.