Professional baseball has nine defensive positions: pitcher, catcher, first baseman, second baseman, third baseman, shortstop, left fielder, center fielder, and right fielder. These positions are divided between the infield (six players) and outfield (three players).
Infield Positions
The infield consists of six players positioned around the diamond. The pitcher throws the ball from the mound in the center. The catcher crouches behind home plate to catch pitches and manage the game. The four corner infielders are the first baseman, second baseman, third baseman, and shortstop. These players field ground balls and throws to make outs and prevent runs.
The Pitcher
The pitcher stands on the mound and throws the ball to the batter. This is the most important position because the pitcher controls the flow of the game. Pitchers must be accurate, strong, and skilled at throwing different types of pitches.
The Catcher
The catcher wears protective gear and sits behind home plate. They catch pitches thrown by the pitcher, throw out runners trying to steal bases, and signal to the pitcher what type of pitch to throw. Catchers are important leaders on the field.
Corner Infielders
The first baseman, second baseman, third baseman, and shortstop are positioned around the bases. The first baseman covers first base and catches throws. The shortstop typically covers the most ground and plays between second and third base. The second baseman and third baseman field balls hit in their direction. These players work together to make double plays and prevent runners from advancing.
Outfield Positions
The three outfielders play in the grass areas beyond the infield: left field, center field, and right field. They catch fly balls and line drives, and throw the ball back to infielders to prevent runners from scoring. The center fielder typically covers the most ground and is often the fastest player. 
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