-Outfielders must cover large distances, so speed, instincts, and quickness in reacting to the ball are key. They must be able to catch fly balls above their head and on the run. They must be able to throw the ball accurately over a long distance to be effective; they must also learn to judge whether to attempt a difficult catch and risk letting the ball get past them, or to instead allow the ball to fall in order to guarantee a swift play and prevent the advance of runners. in baseball, a left fielder is an outfielder who plays defense in left field. Left field is the area of the outfield to the left of a person standing at home plate and facing towards the pitcher's mound. In the numbering system used to record defensive plays, the left fielder is assigned the number 7. Left fielders must also familiarize themselves with the varying configurations of different ballparks' foul territory, and prevent balls hit down the foul lines from getting past them into the left field corner. Amateur players may find it difficult to concentrate on the game, since they are so far from the action. Emphasizing the correct position will give outfield players something to concentrate on at each pitch. Hits to left field tend to curve toward the left field foul line, and left fielders must learn to adjust to that. Of all outfielders, the left fielder often will have the weakest arm, as they generally do not need to throw the ball as far to prevent the advance of any base-runners. The left fielder still requires good fielding and catching skills, and tends to receive more balls than the right fielder because right-handed hitters tend to "pull" the ball into left field. The left fielder also backs up third base on pick-off attempts from the catcher or pitcher and bunts, when possible. Also if a runner is stealing third base the left fielder must back up the throw from the catcher. Left fielders must also back up third base when a ball is thrown from right field, and back up center field when a pop fly is hit into the pocket. Despite giving their teams the advantage of accommodating a player with a weak arm, a left fielder with an above average throwing arm can easily compile many assists.
-A center fielder is the outfielder in baseball who plays defense in center field. which is the baseball fielding position between left field and right field. the center fielder will be the outfielder who has the best combination of speed and throwing distance. The center fielder covers more ‘grass’ than any other player, and will most likely catch the most fly balls. The center fielder also has the greatest responsibility among the three outfielders for coordinating their play to prevent collisions when converging on a fly ball, and on plays where he does not make the catch, he must position himself behind the corner outfielder in case the ball gets past him. He is the captain of the outfield and has the authority to call off the corner fielders when he thinks he can catch the ball. Aside from requiring more speed and range, the center field position is slightly easier to field because balls tend to fly on a straight path, rather than curving as they do for the other outfield positions. A center fielder's vision and depth perception for that matter is a coveted skill and must be considered above average. Because the center fielder requires a good arm and fast legs, center field is generally the position where the team puts its best all-around athletes; as a result, center fielders are often fine hitters as well. Many center fielders are renowned as excellent batters and base runners.

-A right fielder is the outfielder in baseball who plays defense in right field. Right field is the area of the outfield to the right of a person standing at home plate and facing towards the pitcher's mound. In the numbering system used to record defensive plays, the right fielder is assigned the number 9. The right fielder tends to be a stronger offensive player than defensive, as right-handed batters, which are more common than left-handed ones, tend to pull the ball to left field. the right fielder backs up first base on all throws from the catcher and pitcher, when possible, and all bunted balls, since the catcher or the first baseman must be available for fielding the ball. The right fielder backs up second base on any ball thrown from the left side of the field, i.e. shortstop, third base, or foul line territory. The right fielder backs up first base when the first baseman is in a run down between 3rd base and home.