To cover these materials would be out of leather in two separate pieces gone up by 108 points of, red cotton yarn colors and coating of wax. The official principal balls of league which are sold by Rawlings, an American company which manufactures sports equipment and was founded in 1887, sells the size and the exact weight of balls of version of MLB with a signature pressed of police chief Allan Selig on each ball.

A slightly different size is employed on small matches of league to supply with the need for the players.

In first years the made manufacturers deadened cork digs to be the ball, later some synthetic products of replacement were tested by producing balls but were not employed on the principal plays since the weight of the ball and its properties has affected a great part of the play of play. Tighter balls of wound fly or rebound of the beater more quickly. They are the type of balls which are employed now compared with the versions early and with synthetic materials.

During the first years of the sport only one ball was employed all in all the play. If the ball goes upwards on the platform the employees would seek it and would again put it in the play.

It would be obvious that the ball will obtain damaged with long or due will be faded to dirtiness, sweat and some liquids which the players would apply on top. This practice continued until the tragic death of a paste smoothes called Ray Chapman 1920, because it was struck by a baseball which it did not see coming in the weak twilight due to discolouration.

It was after this event occurred that one decided it to maintain clean and the intact balls during the play to be replaced automatically dirtied or damaged balls. Today, of the dozen balls are kept like reservations during the official plays or the minor plays to maintain to reign to maintain the balls in the play intact and clean.

The evolution of the ball contributed an important share to the evolution of the play itself. Starting from materials produced a ball with the idea not to just limit a ball to a simple play but to have reservations to support safety all passed well by the test of time.