1.00 Objectivesof the Game

1.01 Baseball is a game betweentwo teams of nine players each, under direction of a manager, played on an enclosedfield in accordance with these rules, under jurisdiction of one or more umpires.

1.02 The objective of each teamis to win by scoring more runs than the opponent.

1.03 The winner of the game shallbe that team which shall have scored, in accordance with these rules, the greaternumber of runs at the conclusion of a regulation game.

1.04 THE PLAYING FIELD. The fieldshall be laid out according to the instructions below, supplemented by Diagrams No.1, No. 2 and No. 3.

Diagram 1

    The infield shall be a 90 foot square. The outfield shallbe the area between two foul lines formed by extending two sides of the square, asin Diagram 1. The distance from home base to the nearest fence, stand or other obstructionon fair territory shall be 250 feet or more. A distance of 320 feet or more alongthe foul lines, and 400 feet or more to center field is preferable. The infield shallbe graded so that the base lines and home plate are level. The pitcher's plate shallbe 10 inches above the level of home plate. The degree of slope from a point 6 inchesin front of the pitcher's plate to a point 6 feet toward home plate shall be 1 inchto 1 foot, and such degree of slope shall be uniform. The infield and outfield, includingthe boundary lines, are fair territory and all other area is foul territory.
    It is desirable that the line from home base through thepitchers plate to second base shall run East Northeast.
    It is recommended that the distance from home base to thebackstop, and from the base lines to the nearest fence, stand or other obstructionon foul territory shall be 60 feet or more. See Diagram 1.
    When location of home base is determined, with a steel tapemeasure 127 feet, 3 3/8 inches in desired direction to establish second base. Fromhome base, measure 90 feet toward first base; from second base, measure 90 feet towardfirst base; the intersection of these lines establishes first base. From home base,measure 90 feet toward third base; from second base, measure 90 feet toward thirdbase; the intersection of these lines establishes third base. The distance betweenfirst base and third base is 127 feet, 3 3/8 inches. All measurements from home baseshall be taken from the point where the first and third base lines intersect.
    The catcher's box, the batters' boxes, the coaches' boxes,the three foot first base lines and the next batter's boxes shall be laid out asshown in Diagrams 1 and 2.
    The foul lines and all other playing lines indicated in thediagrams by solid black lines shall be marked with wet, unslaked lime, chalk or otherwhite material.
    The grass lines and dimensions shown on the diagrams arethose used in many fields, but they are not mandatory and each club shall determinethe size and shape of the grassed and bare areas of its playing field.
NOTE (a) Any Playing Field constructed by a professional club after June 1, 1958,shall provide a minimum distance of 325 feet from home base to the nearest fence,stand or other obstruction on the right and left field foul lines, and a minimumdistance of 400 feet to the center field fence.
     (b) No existing playing field shall be remodeled after June1, 1958, in such manner as to reduce the distance from home base to the foul polesand to the center field fence below the minimum specified in paragraph (a) above.

1.05 Home base shall be markedby a five sided slab of whitened rubber. It shall be a 17 inch square with two ofthe corners removed so that one edge is 17 inches long, two adjacent sides are 81/2 inches and the remaining two sides are 12 inches and set at an angle to makea point. It shall be set in the ground with the point at the intersection of thelines extending from home base to first base and to third base; with the 17 inchedge facing the pitcher's plate, and the two 12 inch edges coinciding with the firstand third base lines. The top edges of home base shall be beveled and the base shallbe fixed in the ground level with the ground surface.

Diagram 2:

Diagram 2
1.06 First, second and third basesshall be marked by white canvas bags, securely attached to the ground as indicatedin Diagram 2. The first and third base bags shall be entirely within the infield.The second base bag shall be centered on second base. The bags shall be 15 inchessquare, not less than three nor more than five inches thick, and filled with softmaterial.

1.07 The pitcher's plate shallbe a rectangular slab of whitened rubber, 24 inches by 6 inches. It shall be setin the ground as shown in Diagrams 1 and 2, so that the distance between the pitcher'splate and home base (the rear point of home plate) shall be 60 feet, 6 inches.

1.08 The home club shall furnishplayers' benches, one each for the home and visiting teams. Such benches shall notbe less than twenty five feet from the base lines. They shall be roofed and shallbe enclosed at the back and ends.

1.09 The ball shall be a sphereformed by yarn wound around a small core of cork, rubber or similar material, coveredwith two stripes of white horsehide or cowhide, tightly stitched together. It shallweigh not less than five nor more than 5 1/4 ounces avoirdupois and measure not lessthan nine nor more than 9 1/4 inches in circumference.

1.10 (a) The bat shall be a smooth,round stick not more than 2 3/4 inches in diameter at the thickest part and not morethan 42 inches in length. The bat shall be one piece of solid wood.
    NOTE: No laminated or experimental bats shall be used ina professional game (either championship season or exhibition games) until the manufacturerhas secured approval from the Rules Committee of his design and methods of manufacture.
       (b) Cupped Bats. An indentation in the end ofthe bat up to one inch in depth is permitted and may be no wider than two inchesand no less than one inch in diameter. The indentation must be curved with no foreignsubstance added.

Diagram 3:

Diagram 3

       (c) The bat handle, for not more than 18 inchesfrom its end, may be covered or treated with any material or substance to improvethe grip. Any such material or substance, which extends past the 18 inch limitation,shall cause the bat to be removed from the game. NOTE: If the umpire discovers thatthe bat does not conform to (c) above until a time during or after which the bathas been used in play, it shall not be grounds for declaring the batter out, or ejectedfrom the game.
       (d) No colored bat may be used in a professionalgame unless approved by the Rules Committee.

1.11 (a) (1) All players on a teamshall wear uniforms identical in color, trim and style, and all players uniformsshall include minimal six inch numbers on their backs. (2) Any part of an undershirtexposed to view shall be of a uniform solid color for all players on a team. Anyplayer other than the pitcher may have numbers, letters, insignia attached to thesleeve of the undershirt. (3) No player whose uniform does not conform to that ofhis teammates shall be permitted to participate in a game.
       (b) A league may provide that (1) each teamshall wear a distinctive uniform at all times, or (2) that each team shall have twosets of uniforms, white for home games and a different color for road games.
       (c) (1) Sleeve lengths may vary for individualplayers, but the sleeves of each individual player shall be approximately the samelength. (2) No player shall wear ragged, frayed or slit sleeves.
       (d) No player shall attach to his uniform tapeor other material of a different color from his uniform.
       (e) No part of the uniform shall include a patternthat imitates or suggests the shape of a baseball.
       (f) Glass buttons and polished metal shall notbe used on a uniform.
       (g) No player shall attach anything to the heelor toe of his shoe other than the ordinary shoe plate or toe plate. Shoes with pointedspikes similar to golf or track shoes shall not be worn.
       (h) No part of the uniform shall include patchesor designs relating to commercial advertisements.
       (i) A league may provide that the uniforms ofits member teams include the names of its players on their backs. Any name otherthan the last name of the player must be approved by the League President. If adopted,all uniforms for a team must have the names of its players.

1.12 The catcher may wear a leathermitt not more than thirty eight inches in circumference, nor more than fifteen andone half inches from top to bottom. Such limits shall include all lacing and anyleather band or facing attached to the outer edge of the mitt. The space betweenthe thumb section and the finger section of the mitt shall not exceed six inchesat the top of the mitt and four inches at the base of the thumb crotch. The web shallmeasure not more than seven inches across the top or more than six inches from itstop to the base of the thumb crotch. The web may be either a lacing or lacing throughleather tunnels, or a center piece of leather which may be an extension of the palm,connected to the mitt with lacing and constructed so that it will not exceed anyof the above mentioned measurements.

1.13 The first baseman may weara leather glove or mitt not more than twelve inches long from top to bottom and notmore than eight inches wide across the palm, measured from the base of the thumbcrotch to the outer edge of the mitt. The space between the thumb section and thefinger section of the mitt shall not exceed four inches at the top of the mitt andthree and one half inches at the base of the thumb crotch. The mitt shall be constructedso that this space is permanently fixed and cannot be enlarged, extended, widened,or deepened by the use of any materials or process whatever. The web of the mittshall measure not more than five inches from its top to the base of the thumb crotch.The web may be either a lacing, lacing through leather tunnels, or a center pieceof leather which may be an extension of the palm connected to the mitt with lacingand constructed so that it will not exceed the above mentioned measurements. Thewebbing shall not be constructed of wound or wrapped lacing or deepened to make anet type of trap. The glove may be of any weight.

1.14 Each fielder, other than thefirst baseman or catcher, may use or wear a leather glove. The measurements coveringsize of glove shall be made by measuring front side or ball receiving side of glove.The tool or measuring tape shall be placed to contact the surface or feature of itembeing measured and follow all contours in the process. The glove shall not measuremore than 12'' from the tip of any one of the 4 fingers, through the ball pocketto the bottom edge or heel of glove. The glove shall not measure more than 7 3/4''wide, measured from the inside seam at base of first finger, along base of otherfingers, to the outside edge of little finger edge of glove. The space or area betweenthe thumb and first finger, called crotch, may be filled with leather webbing orback stop. The webbing may be constructed of two plies of standard leather to closethe crotch area entirely, or it may be constructed of a series of tunnels made ofleather, or a series of panels of leather, or of lacing leather thongs. The webbingmay not be constructed of wound or wrapped lacing to make a net type of trap. Whenwebbing is made to cover entire crotch area, the webbing can be constructed so asto be flexible. When constructed of a series of sections, they must be joined together.These sections may not be so constructed to allow depression to be developed by curvaturesin the section sides. The webbing shall be made to control the size of the crotchopening. The crotch opening shall measure not more than 4 1/2'' at the top, not morethan 5 3/4'' deep, and shall be 3 1/2'' wide at its bottom. The opening of crotchshall not be more than 4 1/2'' at any point below its top. The webbing shall be securedat each side, and at top and bottom of crotch. The attachment to be made with leatherlacing, these connections to be secured. If they stretch or become loose, they shallbe adjusted to their proper condition. The glove can be of any weight.

1.15 (a) The pitcher's glove shallbe uniform in color, including all stitching, lacing and webbing. The pitcher's glovemay not be white or gray.
       (b) No pitcher shall attach to his glove anyforeign material of a color different from the glove.

1.16 A Professional League shalladopt the following rule pertaining to the use of helmets:
       (a) All players shall use some type of protectivehelmet while at bat.
       (b) All players in National Association Leaguesshall wear a double ear flap helmet while at bat.
       (c) All players entering the Major Leagues commencingwith the 1983 championship season and every succeeding season thereafter must weara single ear flap helmet (or at the player's option, a double ear flap helmet), exceptthose players who were in the Major League during the 1982 season, and who, as recordedin that season, objected to wearing a single ear flap helmet.
       (d) All catchers shall wear a catcher's protectivehelmet, while fielding their position.
       (e) All bat/ball boys or girls shall wear aprotective helmet while performing their duties. If the umpire observes any violationof these rules, he shall direct the violation to be corrected. If the violation isnot corrected within a reasonable time, in the umpire's judgment, the umpire shalleject the offender from the game, and disciplinary action, as appropriate, will berecommended.

1.17 Playing equipment includingbut not limited to the bases, pitcher's plate, baseball, bats, uniforms, catcher'smitts, first baseman's gloves, infielders and outfielders gloves and protective helmets,as detailed in the provisions of this rule, shall not contain any undue commercializationof the product. Designations by the manufacturer on any such equipment must be ingood taste as to the size and content of the manufacturer's logo or the brand nameof the item. The provisions of this Section 1.17 shall apply to professional leaguesonly. NOTE: Manufacturers who plan innovative changes in baseball equipment for professionalbaseball leagues should submit same to the Official Playing Rules Committee priorto production.

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