<P> 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 . 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 ⁄ ounces ( 142 and 149 g ) , and is 9 to 9 ⁄ inches ( 229 -- 235 mm ) in circumference ( 2 ⁄ -- 3 in or 73 -- 76 mm in diameter ) . There are 108 double stitches on a baseball , or 216 individual stitches . </P>
<P> 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 . 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 ⁄ ounces ( 142 and 149 g ) , and is 9 to 9 ⁄ inches ( 229 -- 235 mm ) in circumference ( 2 ⁄ -- 3 in or 73 -- 76 mm in diameter ) . There are 108 double stitches on a baseball , or 216 individual stitches . </P>
what is the diameter of a major league baseball
what is the diameter of a major league baseball
2 ⁄ -- 3 in or 73 -- 76 mm in diameter
2 ⁄ -- 3 in or 73 -- 76 mm in diameter