Positions and defensive roles
Baseball positions explained: pitcher, catcher, infield and outfield
A practical guide to the nine defensive positions, what each area of the field is responsible for, and how the 1–9 scorekeeping numbers map to those positions.
The nine defensive positions
With the other team batting, a standard defense fields one player at each of nine positions: pitcher, catcher, first baseman, second baseman, third baseman, shortstop, left fielder, center fielder and right fielder. The labels describe the players’ usual areas and responsibilities, although fielders can move with the game situation.
Pitcher, catcher and the infield
The pitcher delivers the ball from the mound and also fields balls near it. The catcher receives pitches behind home plate, blocks balls and helps control the running game. The four infielders cover the bases and nearby ground balls; first basemen receive many throws for force outs, while second basemen and shortstops are central to many double plays.
The three outfielders
Left, center and right fielders cover the deeper part of the field, catch fly balls and return the ball to the infield. Center field usually demands the widest range and often takes priority on catchable balls between outfielders; corner outfielders also need accurate throws to stop runners from taking extra bases.
Why positions are numbered 1 through 9
Scorekeeping uses a fixed defensive numbering system: pitcher 1, catcher 2, first base 3, second base 4, third base 5, shortstop 6, left field 7, center field 8 and right field 9. These are position numbers, not batting-order spots or uniform numbers. For example, a 6-3 groundout means the shortstop fielded the ball and threw to first base for the out.