what is the diameter of a major league baseball
Baseball (ball) Throughout the 20th Century, Major League Baseball used two technically identical but differently marked balls. The American League had "Official American League" and the American League's president's signature in blue ink, while National League baseballs had "Official National League" and the National League president's signature in black ink. According to Bob Feller, in the 1930s, when he was a rookie in the National League, baseball laces were black, intertwined with red; the American League's were blue and red.[9] In 2000, Major League Baseball reorganized its structure to eliminate the position of league presidents, and switched to one ball specification for both leagues. Under the current rules, a major league baseball weighs between 5 and 5 1⁄4 ounces (142 and 149 g), and is 9 to 9 1⁄4 inches (229–235 mm) in circumference (2 7⁄8–3 in or 73–76 mm in diameter).[10] There are 108 double stitches on a baseball, or 216 individual stitches.
Little League Baseball 1971: The aluminum baseball bat is first used. It was partly developed by Little League Baseball. Lloyd McClendon of Gary, Indiana, dominates the Little League World Series, hitting five home runs in five at-bats. He later played in the Major Leagues and become the first Little League graduate to manage an MLB club with the Pittsburgh Pirates.[2]