Runners are encouraged to overrun 1st base. Runners must stay on the base until the ball has been hit. Leaving the base early will result in an out. A runner is allowed to advance one base on an overthrow of first base. If a runner off base is struck directly by a batted ball, the ball is dead, the runner is out, and the batter is awarded first base.
All defensive players wear a special glove to catch the ball.
A DH is allowed in the AL only. He is positioned right to 2nd base, and has to cover 2nd. The shortstop fills the gap between 2nd and 3rd and tries to hold the ball in the infield. Like every other outfielder, the CF has to be a fast runner and he must have a hard throw, to reach the infield. Step with opposite foot as throwing arm.