2018 Official Baseball Rules 2018 Official Baseball Rules

1 Official Baseball RULES2018 Edition2018 Official Baseball Rules_2018 Official Baseball Rules 2/27/18 2:16 PM Page iCopyright 2018by the Office of the Commissioner of BaseballAll rights part of the Official Baseball Rulesmay be reproduced ortransmitted in any form or by any means, electronic or mechanical,including photocopy, recording, or any information storage and retrieval systemnow known or to be invented, without permission in writing fromthe Office of the Commissioner of SecretaryPaul V. Mifsud, LepperdPrinted in the United States of AmericaThe Major League Baseball silhouetted batter logo is aregistered trademark of Major League Baseball Properties, photo by Alex Trautwig/MLB 978-0-9961140-6-6 Official Baseball Rules2018 EditionOFFICIAL PLAYING Rules COMMITTEES andy Alderson.

2 Chair Jon Daniels John MozeliakChris Antonetti Jerry Dipoto John SchuerholzSam Bernabe Brian Gorman Joe TorreAmateur Baseball Advisory MemberMike Gaski2018 Official Baseball Rules_2018 Official Baseball Rules 2/27/18 2:16 PM Page iiiiiOFFICIAL Baseball RULESR ecodified, amended and adopted by the Professional Baseball PlayingRules Committee at New York, , December 21, 1949; amended at NewYork, , February 5, 1951; Tampa, Fla.

3 , March 14, 1951; Chicago, Ill.,March 3, 1952; New York, , November 4, 1953; New York, ,December 8, 1954; Chicago, Ill., November 20, 1956; Tampa, Fla., March30-31, 1961; Tampa, Fla., November 26, 1961; New York, , January 26,1963; San Diego, Calif., December 2, 1963; Houston, Tex., December 1,1964; Columbus, Ohio, November 28, 1966; Pittsburgh, Pa., December 1,1966; Mexico City, Mexico, November 27, 1967; San Francisco, Calif.,December 3, 1968; New York, , January 31, 1969; Fort Lauderdale, Fla.,December 1, 1969; Los Angeles, Calif., November 30, 1970; Phoenix, Ariz.

4 ,November 29, 1971; St. Petersburg, Fla., March 23, 1972; Honolulu, Hawaii,November 27, 1972; Houston, Tex., December 3 and 7, 1973; New Orleans,La., December 2, 1974; Hollywood, Fla., December 8, 1975; Los Angeles,Calif., December 6, 1976; Honolulu, Hawaii, December 5, 1977; Orlando,Fla., December 4, 1978; Toronto, Ontario, Canada, December 3, 1979;Dallas, Tex., December 8, 1980; Hollywood, Fla., December 7, 1981;Honolulu, Hawaii, December 5, 1982; Nashville, Tenn., December 5, 1983;New York, , January 8, 1985; New York, , March 27, 1986;Hollywood, Fla.

5 , December 9, 1986; New York, , November 23, 1987;New York, , January 26, 1989; Chicago, Ill., December 3, 1990; Miami,Fla., December 5, 1991; Louisville, Ky., December 4, 1992; Atlanta, Ga.,December 12, 1993; New York, , January 30, 1996; Mail vote, January2006; Teleconference, December 20, 2006; Teleconference, February 5,2008; Las Vegas, Nev., December 9, 2008; Teleconference, May 26, 2009;Teleconference, January 25, 2010; Lake Buena Vista, Fla., December 8,2010; Teleconference, February 16, 2011; Dallas, Tex., December 7, 2011;Nashville, Tenn., December 5, 2012; Orlando, Fla.

6 , December 11, 2013;Recodified, amended and adopted at San Diego, Calif., December 10, 2014;amended at Nashville, Tenn., December 9, 2015; Teleconference, January11, 2017; Lake Buena Vista, Fla., December 13, 2017; Mail vote, Official Baseball Rules_2018 Official Baseball Rules 2/27/18 2:16 PM Page iiiivFOREWORDThis code of Rules governs the playing of Baseball games by professionalteams of Major League Baseball and the leagues that are members of theNational Association of Professional Baseball recognize that many amateur and non-professional organizations playtheir games under professional Rules and we are happy to make our rulesavailable as widely as possible.

7 It is well to remember that specifications asto fields, equipment, etc., may be modified to meet the needs of each fines, long-term suspensions and similar penalties imposed by thiscode are not practicable for amateur groups, but officers and umpires of suchorganizations should insist on strict observance of all the Rules governing theplaying of the not only has maintained its position as the National Game of theUnited States, but also has become an International Game being played inmore than 100 countries. The popularity of the game will grow only so longas its players, managers, coaches, umpires and administrative officersrespect the discipline of its code of Official Baseball Rules_2018 Official Baseball Rules 2/27/18 2:16 PM Page ivv(2)The Playing Rules Committee, at its December 1977 meeting, voted toincorporate the Notes/Case Book/Comments section directly into theOfficial Baseball Rules at the appropriate places.

8 Basically, the CaseBook interprets or elaborates on the basic Rules and in essence have thesame effect as Rules when applied to particular sections for which theyare arrangement is designed to give quicker access to any written lan-guage pertaining to an Official Rule and does not require a reader torefer to different sections of the Official Baseball Rules book in con-sidering the application of a particular NOTES(1)The Playing Rules Committee, at its December 2014 meeting, voted toreorganize and recodify the Official Baseball Rules into a more logicaland organized manner.

9 No wording or language was changed (otherthan the amendments made for that year); only the order and place-ment of the Rules were modified. In this edition Comments to theOfficial Rules are highlighted in a shaded box rather than beingprinted in smaller typeface as had been the case in prior to Official Baseball Rules_2018 Official Baseball Rules 2/27/18 2:16 PM Page vviThe Official Playing Rules Committee made the following changes thatwill be in effect for the 2018 season: Amended Rule (c) to change the length of time between doublehead-ers. Amended Rule (b) regarding warm-up pitches that a pitcher maythrow.

10 Amended Rule (c)(1) Comment regarding a runner who takes a fly-ing start from behind a base when tagging up; namely, such violation isnow considered an appeal play. Re-titled Rule (l) and amended Rule (l) Comment regardingwarm-up pitches when a substitute pitcher enters a game in the situationdescribed in the last paragraph of Rule (l) Comment. Established new Rule (m) limiting the number of mound visits pergame. Amended Rule (a)(5) Comment to clarify that a runner who is return-ing to his last legally touched base after being put out is considered thesame as a runner who continues to advance after being put out relative tointerfering with a subsequent play.