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How Much Does A Baseball Weigh? 

Written by Chris 

Published on February 22, 2024

Recently, my son and I set out for a game of catch, only to discover that we had accidentally left some baseballs out in the rain. As he tossed one to me, he remarked on its unusual heaviness, sparking his curiosity with the question, "How much does a baseball weigh?"


I found myself stumped, not knowing the weight of a baseball. Intrigued, we decided to explore this together. Jumping into the MLB rulebook, we learned that for a baseball to be eligible for official games, it must weigh between 5 and 5.25 ounces.

How Much Does A Baseball Weigh?

So how heavy is a baseball supposed to be for different leagues and ages? Let's break it down for you. The official baseball weight is between 5 and 5.25 ounces or between 141 and 147 grams. It is made of a cushion cork center coated with two layers of special rubber, wrapped tightly in yarn, and then covered with leather. 


The stitching on a baseball is important for cosmetic appeal but also because it can affect the ball's aerodynamics. A well-made baseball features 108 double stitches, and workers hand-stitch each one.

Official ruling

According to rule 3.01 in the Official MLB Rule Book:

It shall weigh not less than five nor more than 5¼ ounces avoirdupois and measure not less than nine nor more than 9¼ inches in circumference.


Major League Baseball sets strict guidelines for the weight and size of baseballs, with specifications developed by MLB and Rawlings that are even more precise than those in the MLB rulebook. The weight of a baseball can vary with the weather. In humid conditions, the leather absorbs moisture, making the ball heavier. Conversely, in cold weather, the ball's cork contracts, also increasing its weight.


This weight variation influences how the ball spins when thrown. Heavier baseballs spin less compared to lighter ones, as the added weight makes altering the ball's rotation more challenging.


To maintain consistency, officials store the baseballs used in games in a humidor. This storage method prevents them from drying out and becoming too hard, which is crucial because a harder ball can travel further when hit. This careful management ensures the baseballs perform as expected under varying conditions.

How Much Does A Little League Baseball Weigh?

Most Little League baseballs weigh between 5 and 5¼ ounces (142 and 149 grams). However, for Tee-Ball leagues, the ball's weight isn't as heavy, ranging from 4 to 5 ounces (114 and 142 grams).


While Little League baseballs weigh the same as those used by professional players, manufacturers wind them less tightly. Manufacturers of these youth-level balls produce them like this to make them softer and reduce injury risk.

History Of The Baseball

Baseball's invention can't be credited to just one person. In its early days, cobblers often made the "lemon peel" baseballs, using rubber scraps from old shoes. They wrapped yarn around these rubber cores and covered them with leather stitched in four lines. However, practices varied, with some regions using sturgeon eyes instead of rubber.


The design of the baseball has evolved significantly. A major change occurred in 1876 when A.G. Spalding standardized its manufacturing. Before this, baseballs were handmade, leading to wide variations in weight and quality, which made it hard for players to predict how the ball would behave.

Dead-Ball Era of Baseball

This era featured low-scoring games and very few home runs. Baseballs then were lighter and differed greatly from one another. This period started with the National League's formation in 1876 and ended in 1919 with Babe Ruth's 54th home run, which began the Live-Ball Era.


The lack of scoring in the Dead-Ball Era was mainly due to the baseballs themselves, which were inconsistent and heavier compared to today's standards.

Evolution Of The Baseball

Live Ball Era

The "Live Ball Era" in baseball, spanning from 1920 to the mid-1950s, significantly changed the game's play style. In this period, manufacturers wound baseballs less tightly, resulting in more reactive and "lively" balls when players hit them. This change led to an increase in home runs, adding excitement to the game.


Iconic players like Babe Ruth and Willie Mays, known for their remarkable hitting abilities, thrived in this era. The livelier balls contributed to higher-scoring games, prompting teams to adopt more aggressive offensive strategies.


However, this era gradually ended as manufacturers started winding baseballs tighter again. They made this adjustment to balance the game, reducing the frequency of home runs and refocusing on other aspects of baseball strategy and skill.

Ball Construction During WWII

World War II's high demand for rubber, needed for military purposes, led to a shortage affecting baseball manufacturing. Cork became a popular alternative due to its availability, replacing the scarce rubber.


Cork offered benefits like being lightweight, making it easier to hit far, and more resilient, not deforming much on impact. However, it was less elastic than rubber, resulting in a harder ball that could break bats more easily.
Poster

Final Thoughts On Baseball Weight

Our comprehensive exploration of baseball's evolution and its impact on the game has covered all the essentials of baseball composition, including the key question: "How much does a baseball weigh?" This exploration equips you with a wealth of knowledge on the topic, all consolidated in one informative article.

Frequently Asked Questions

How Long Do Baseballs Last in an MLB game?

The average baseball in a professional game lasts for 7 pitches. Rawlings, the official supplier for MLB, makes about 4,000 dozen balls weekly, totaling around 2.4 million yearly for games, batting practice, and souvenirs.

How Many Baseballs Are Used In An MLB Game?

An average MLB baseball game will go through between seven and 10 dozen balls. Extrapolated for the regular season and postseason, MLB's total number of baseballs used is massive. 

Why Do They Replace Baseballs During An MLB Game?

If the umpire sees a scuffed or dirty ball, he must replace it with a new one to ensure visibility for hitters and prevent pitchers from gaining an advantage through scuff marks.

How Many Stitches Are On A Baseball?

The 108 double stitches on a baseball play a crucial role as they not only hold the baseball together but also influence how players throw and hit it.

Does AAA Use The Same Baseballs As MLB?

Triple-A baseball leagues use the same baseballs that MLB uses. Leagues below Double-A typically use a ball that is constructed to be less lively.

How Much Does A High School Baseball Weigh?

If you are wondering how much does a high school baseball weigh, it is the same weight as the baseballs used in Major League Baseball. 5 - 5.25 ounces.

How Much Do Soft Rubber Baseballs Weigh?

These types of baseballs usually weigh around 4.2 ounces. For these reasons, soft-compression baseballs are often used in youth leagues and camps. 

What is a Baseball Made Of?

The core typically consists of tightly wound cork, rubber, and yarn, and manufacturers stitch two pieces of leather together to create the outer cover.