Everytime i compile i get no errors but when i run it and hit enter I
get this.

Exception in thread "main" java.lang.NullPointerException
   at Baseball.main(Baseball.java:37)

How would i fix this?

import java.util.*;
/**
* @(#)Baseball.java
*
*
* @author
* @version 1.00 2007/12/9
*/

public class Baseball {

        private int number, hits, walks, outs;

   public Baseball() {
        number = 0;
        hits = 0;
        walks = 0;
        outs = 0;

   }
   public static void main(String[] args) {

       Scanner console = new Scanner(System.in);

       Baseball[] player = new Baseball[20];

       int gameCounter = 1;

       System.out.println("This program asks the user for a baseball
player's number\n"
       + "and their number of hits, walks, and outs for multiple games.
\n" +
       "Only nine players bat each game.\n\n");

       while(gameCounter <= 20){
       System.out.print("For game " + gameCounter + ", enter the player
number:");
       player[gameCounter].number = console.nextInt();
       System.out.print("Enter the hits for game " + gameCounter + " for
player " + gameCounter);
       player[gameCounter].hits = console.nextInt();
       System.out.print("Enter the walks for game " + gameCounter + "
for player " + gameCounter);
       player[gameCounter].walks = console.nextInt();
       System.out.print("Enter the outs for game " + gameCounter + " for
player " + gameCounter);
       player[gameCounter].outs = console.nextInt();
       }

       //System.out.println(player[1]);

   }
}