infielder

An infielder is a defensive player in baseball and softball who occupies one of the four standard infield positions: first base, second base, shortstop, or third base. Infielders are responsible for fielding ground balls, catching line drives that stay in the infield, and making plays at the bases to record outs. They typically operate close to the baselines and must react quickly, demonstrate solid glove work, and communicate effectively with teammates to coordinate plays such as double plays and cutoffs.

Middle infielders, such as second basemen and shortstops, are often responsible for starting and completing double plays and for covering extensive ground on balls hit up the middle. Corner infielders—first and third basemen—handle plays at the bases, field bunts, and receive throws from other infielders. The infield defense relies on quick transitions, accurate throws, and strong awareness of baserunning.

A utility infielder is a player who can competently handle multiple infield positions, providing defensive flexibility for a team and allowing for strategic lineup shifts due to injury or matchup considerations.

Defensive performance for infielders is tracked with statistics such as fielding percentage, range factor, and advanced metrics like Defensive Runs Saved and Ultimate Zone Rating. Offensively, infielders vary widely; some emphasize contact hitting, while others contribute power. Overall, the infielder's role centers on defensive reliability, game management, and contributing to team success through both fielding and, to a varying degree, hitting.