Normal (No one on)
The first baseman takes his position in the infield in such a spot that there is no extra effort on his part to reach the bag in time to receive the throw.
As soon as the ball is hit to any other infielder, he breaks immediately for the bag, takes a position in front of the bag, with his feet stationary in front of the bag before the throw reaches him, and should be ready to shift instantly in either direction if the ball is thrown wide. On balls thrown wide to the left side of the bag, he shifts the position of his feet so that his right foot is in contact with the bag and his left foot is extended as far as possible away from the bag. On balls throws wide to the left side of the bag, he shifts the position of his feet so that his right foot is in contact with the bag, and his left foot is extended as far as possible away fro the bag. On balls thrown wide to the right side of the bag, the first baseman shifts his feet so that his left foot is in contact with the bag and his right foot is extended as far as possible away from the bag. Always remember, the most important thing is to catch the ball.
On all throws that are not wide of the bag, the left-handed first baseman keeps his left foot on the bag and extends his right foot; the right-handed man keeps his right foot on the bag and extends his left foot.
On good throws, the first baseman should stretch as far as possible to meet the ball on anticipated close plays. The hardest play to first base is the ball thrown on the left side of the bag, directly in the path of the base runner. If there is time to step completely off the bag and catch the ball and then touch the runner, do so. On high-thrown balls, the first baseman should, if there is plenty of time, take a step back into foul territory, keeping his left foot (if a left-hander) and his right foot (if a right-hander) on the bag, reaching high into the air for the catch.
The first baseman should try for every ball that it is possible for him to reach. It is the duty of the second baseman to chase him away if he attempts to field a ball more easily handled by the second baseman. The second baseman does this by shouting, "I've got it!" Then the first baseman immediately returns to his bag for the put-out.
Whenever the first baseman goes for a ball, the pitcher covers first base. In making throws to the pitcher covering, the first baseman should make all throws so they can be caught shoulder high, at least two steps from the bag. These throws will be made with an underhand toss motion while striding toward the bag. When the ball is fielded deep, and when the pitcher has time to cover first base and come to a stop—ready to catch the throw like a first baseman—the throw should be made overhanded "with something on it."
Runner on First Base and Situation Prompts a Bunt
The first baseman comes toward the plate—but not too quickly. If the batter bunts down the first-base side of the playing field, the first baseman charges quickly toward the plate for a possible force play at second base. If there is no chance for a play at second base, he will throw to the second baseman covering first base. On bunts toward third base, the first baseman returns to the bag to make the put-out. After the put-out, he rushes into the infield to help break up any attempt by the runner to advance to third base. When the pitcher fields the bunted ball, the first baseman returns to the bag, if possible, to make the play. Otherwise, the second baseman takes the throw from the pitcher.
Runners on First Base and Second Base
If the bunt is in order, play close in—halfway between the pitcher's box and first base. If the ball is bunted, field the ball and throw to the base called by the catcher. If the bunt is not in order, play in the normal position.
Double play starting from first base: A left-handed first baseman, in starting a double play from first base to second base, fields the ball and throws the ball to second base, making sure of the force-out at second base. When a right-handed first baseman fields the ball, he pivots on his right foot and takes a quarter turn and throws to second base, making sure of the force-out at second base. The first baseman must then return quickly to first base to receive the throw, which completes the double play. The first baseman should throw to the inside of second base when throwing to the short stop. On balls fielded deep in the first-base position, throw the ball to the outside of second base when throwing to the short stop.
On two base hits, back up second base on throws from left and center fields.
On any ball thrown by the catcher, other than on an attempt to pick a man off first base, take the throw inside the diamond. This is to avoid having the ball hit the runner. When the catcher throws, in an attempt to pick off a runner, always make a tag at the runner.