A typical baseball weighs between 5 and 5.25 ounces (142 and 149 grams). The weight is specified by the official rules of Major League Baseball (MLB) and must be adhered to for all official games. The weight of the ball is carefully considered, as it affects its performance and the fairness of the game. A ball that is too heavy or too light can be difficult for players to handle and can give an unfair advantage to one team.