Outfielders must cover large distances, so speed, instincts and quickness to react 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. 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. The center fielder must back up second base on all bunts and throws from the catcher.