Each player has a role to fulfill on the field.
The 1st Baseman
1st Baseman Responsibilities
One of his most common plays occurs when a batter hits a ground ball, and is attempting to reach first base. Another fielder collects the baseball and throws it to the first baseman, who then catches it with his foot on the base (sometimes he will catch it while not on the base; if this is the case, he must run and touch the base). If the first baseman has possession of the baseball and touches the base before the runner does, then the runner is out. We will learn more about ground balls in future chapters.
1st Baseman Physical Traits
The first baseman is often tall and a left-handed thrower. Being tall gives him an advantage so he can reach throws that fall short of first base. Being left-handed is also an advantage; since he is situated on the right edge of the field, all his throws go to his right (and it is easier to throw to the right using your left arm).
Serving as a second Line of Defense
If the baseball is not automatically caught by a fielder, the first baseman is the second line of defense in preventing batters from becoming baserunners. When the pitcher cannot get the batter out at home plate, the first baseman is usually the next person charged with getting him out. Many outs are made at first base, so it is important that the first baseman can catch well.