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The Official Professional Baseball Rules Book governs all aspects of the game of Major League Baseball beyond what happens on the field of play. There are a number of sources for these rules, but they all ultimately are sanctioned by the Office of the Commissioner of Baseball .
A regulation baseball is 9 to 9.25 inches (229 to 235 mm) in circumference i.e. 2.86 to 2.94 inches (73 to 75 mm) in diameter, with a weight of 5 to 5.25 ounces (0.142 to 0.149 kg). [1] The leather cover is commonly formed from two saddle-shaped pieces stitched together, typically with red-dyed thread.
Starting with the Knickerbocker Rules in 1845, and the National League Rules in 1877, the rules of baseball have evolved over time. The 2014 edition of the rulebook fills about 250 pages. [6] After the 2014 season, the Playing Rules Committee reorganized and recodified the rules.
These rules do not apply to the World Baseball Classic, which is organized jointly by the WBSC and MLB. The baseball rulebook of the National Collegiate Athletic Association (NCAA), aside from governing the games of that organization's members, is also used by several other competitions involving college-aged players.
Major League Baseball (MLB) and Nippon Professional Baseball (NPB) are the highest levels of baseball in the United States and Japan, respectively. MLB started in 1876, while NPB was not formed until 1950, following reorganization of the Japanese Baseball League, which had been in existence since 1936. Though ostensibly the same game, baseball ...
Linear Weights, or batting runs, is a central concept to baseball analysis. Linear Weights is a type of baseball statistic that uses “a weighted system for measuring the impact of hitting events.” [3] They compare a particular individual player's ability with an average player's ability. Ferdinand Cole Lane first began exploring linear ...
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Major League Baseball and the National Baseball Hall of Fame do not recognize it as a major league, but the NA comprised most of the professional clubs and the highest caliber of play then in existence. Its players, managers, and umpires are included among the "major leaguers" who define the scope within baseball references such as Retrosheet. [2]