![Green Monster](https://upload.wikimedia.org/wikipedia/commons/3/3c/Green_Monster.jpg)
In
baseball
Baseball is a bat-and-ball sport played between two teams of nine players each, taking turns batting and fielding. The game occurs over the course of several plays, with each play generally beginning when a player on the fielding tea ...
, ground rules are special rules particular to each
baseball park
A ballpark, or baseball park, is a type of sports venue where baseball is played. The playing field is divided into the infield, an area whose dimensions are rigidly defined, and the outfield, where dimensions can vary widely from place to pla ...
(grounds) in which the game is played. Unlike the well-defined playing field of most other sports, the playing area of a
baseball field
A baseball field, also called a ball field or baseball diamond, is the field upon which the game of baseball is played. The term can also be used as a metonym for a baseball park. The term sandlot is sometimes used, although this usually refers ...
extends to an outfield fence in fair territory and the stadium seating in foul territory. The unique design of each ballpark, including fences,
dugouts,
bullpen
In baseball, the bullpen (or simply the pen) is the area where relief pitchers warm up before entering a game. A team's roster of relief pitchers is also metonymically referred to as "the bullpen". These pitchers usually wait in the bullpen if t ...
s, railings, stadium domes, photographer's wells and TV camera booths, requires that rules be defined to handle situations in which these objects may interact or interfere with the ball in play or with the players.
Major League Baseball
Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. MLB is composed of 30 total teams, divided equally between the National League (NL) and the American League (AL), ...
has defined a set of "universal ground rules" that apply to all MLB ballparks;
individual ballparks have the latitude to set ground rules above and beyond the universal ground rules, as long as they do not directly contradict each other. Additionally, a set of universal ground rules exists for the six MLB stadiums with
retractable roof
A retractable roof is a roof system designed to roll back the roof of a structure so that the interior of the facility is open to the outdoors. Retractable roofs are sometimes referred to as operable roofs or retractable skylights. The term op ...
s, with the individual ballparks able to set additional rules.
The term
ground rule double
A ground rule double is a baseball rule that awards two bases from the time of pitch to all baserunners including the batter-runner, as a result of the ball leaving play after being hit fairly and leaving the field under a condition of the ground ...
is often applied to a batted ball that bounces fair, then over the outfield fence in fair or foul territory, although some commentators and writers shun the term because league-wide rules, not ground rules, apply in this case.
MLB
Universal
*Ball on the top step (lip) of the
dugout is in play.
**No equipment is permitted to be left on the top step (lip) of the dugout. If a ball hits equipment left on the top step it is dead.
*A player is not permitted to step or go into a dugout to make a catch.
*A player is permitted to reach into a dugout to make a catch. If a player makes a catch outside the dugout and the player's momentum carries him into the dugout, then the catch is allowed and the ball remains alive as long as the player does not fall while in the dugout.
*A batted ball
in flight
In baseball, the rules state that a batted ball is considered in flight when it has not yet touched any object other than a fielder or his equipment. Such a ball can be caught by a fielder to put the batter out.
Once a batted ball touches the g ...
can be caught between or under railings and around screens.
**A catch may be made on the field tarp.
*Batted or thrown ball ''lodging in'' the rotating signage behind home plate or along first base or third base stands is out of play.
**Batted or thrown ball ''resting on'' the rotating signage behind home plate or along first base or third base stands is in play.
*The facings of railings surrounding the dugout and photographers areas are in play.
**Any cameras or microphones permanently attached on railings are treated as part of the railings and are in play.
**Any recessed railings or poles that are in the dugout and photographers areas are out of play and should be marked with red to mark them out of play.
*Robotic cameras attached to the facing of the backstop screen are considered part of the screen.
**A batted ball striking the backstop camera is considered a dead ball.
**A thrown ball striking the backstop camera is considered in play.
*A ball striking the guy wires that support the backstop is a dead ball.
*A ball lodging behind or under canvas on field tarp is out of play.
*A ball striking the field tarp and rebounding onto the playing field is in play.
*No chairs can be brought out of the dugout or bullpen and onto the playing field.
*All yellow lines are in play.
*A live ball striking the backstop screen or protective netting located on the field boundaries along the first and third base lines is in play.
**A ball striking protective netting located behind out-of-play areas such as dugouts and photographer areas is dead even if it rebounds onto the field.
*Where a roof is present, a batted ball that becomes lodged in the roof above fair territory is dead and the runners including batter-runner are awarded two bases. Ballpark-specific ground rules may supersede this rule.
*On outfield walls composed of sections with different heights (e.g.,
Fenway Park
Fenway Park is a baseball stadium located in Boston, Massachusetts, United States, near Kenmore Square. Since 1912, it has been the home of the Boston Red Sox, the city's American League baseball team, and since 1953, its only Major League Base ...
,
Oracle Park
Oracle Park is a Major League Baseball stadium in the SoMa neighborhood of San Francisco, California. Since 2000, it has been the home of the San Francisco Giants. Previously named Pacific Bell Park, SBC Park, and AT&T Park, the stadium's curre ...
), a batted ball in flight that strikes a taller section of the wall in fair territory at a point higher than the top of the adjacent shorter wall, then bounds out of play over the shorter wall, is a home run.
**Conversely, a batted ball in flight that strikes the shorter wall in fair territory then bounds out of play over the adjacent taller wall is a dead ball and the runners including batter-runner are awarded two bases.
Individual ballpark
Individual ballpark ground rules vary greatly from ballpark to ballpark. For the 2017 season,
Citi Field
Citi Field is a baseball stadium located in Flushing Meadows–Corona Park in New York City, United States. It opened in 2009 and is the home field of Major League Baseball's New York Mets. The stadium was built as a replacement for the adjacent ...
,
Kauffman Stadium
Kauffman Stadium (), often called "The K", is a baseball stadium located in Kansas City, Missouri. It is home to the Kansas City Royals of Major League Baseball (MLB). It is part of the Truman Sports Complex together with the adjacent Arrowhe ...
,
Target Field
Target Field is a baseball stadium in the North Loop, Minneapolis, historic warehouse district of downtown Minneapolis. Since its opening in 2010, the stadium has been the home ballpark of Major League Baseball's Minnesota Twins. The stadium hos ...
,
Yankee Stadium
Yankee Stadium is a baseball stadium located in the Bronx, New York City. It is the home field of the New York Yankees of Major League Baseball, and New York City FC of Major League Soccer.
Opened in April 2009, the stadium replaced the origi ...
, and
Guaranteed Rate Field are the only MLB ballparks that do not have individual ground rules above the universal set.
Examples of ground rules that have been or are still in major league ballparks include:
*
Fenway Park
Fenway Park is a baseball stadium located in Boston, Massachusetts, United States, near Kenmore Square. Since 1912, it has been the home of the Boston Red Sox, the city's American League baseball team, and since 1953, its only Major League Base ...
(
Boston Red Sox
The Boston Red Sox are an American professional baseball team based in Boston. The Red Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) East division. Founded in as one of the American League's eight ...
) – A fly ball that strikes the top of the ladder on the
Green Monster
The Green Monster is a popular nickname for the left field wall at Fenway Park, home to the Boston Red Sox of Major League Baseball. The wall is from home plate and is a popular target for right-handed hitters.
Overview
The wall was part ...
and then bounces out of play is two (2) bases.
*
Minute Maid Park
Minute Maid Park is a retractable roof stadium in Houston, Texas, United States. It opened in 2000 as the home ballpark of Major League Baseball's Houston Astros. It has a seating capacity of 41,168, which includes 5,197 club seats and 63 ...
(
Houston Astros
The Houston Astros are an American professional baseball team based in Houston, Texas. The Astros compete in Major League Baseball (MLB) as a member club of the American League (AL) West division, having moved to the division in 2013 after ...
) – A batted ball striking
the flagpole in center field and bouncing onto the field is in play; a ball striking the flagpole while in flight and leaving the playing field is a
home run
In baseball, a home run (abbreviated HR) is scored when the ball is hit in such a way that the batter is able to circle the bases and reach home plate safely in one play without any errors being committed by the defensive team. A home run i ...
. The flagpole and the hill that it was on were removed following the 2016 season, and the rule has been removed from the specific ballpark rules list.
*
Tropicana Field
Tropicana Field (commonly known as the Trop) is a multi-purpose domed stadium located in St. Petersburg, Florida, United States. The stadium has been the home of the Tampa Bay Rays of Major League Baseball (MLB) since the team's inaugural sea ...
(
Tampa Bay Rays
The Tampa Bay Rays are an American professional baseball team based in St. Petersburg, Florida. The Rays compete in Major League Baseball (MLB) as a member club of the American League (AL) American League East, East division. Since its inception ...
) – A batted ball that hits either of the two lower
catwalks
A fashion show ( French ''défilé de mode'') is an event put on by a fashion designer to showcase their upcoming line of clothing and/or accessories during a fashion week. Fashion shows debut every season, particularly the Spring/Summer and Fa ...
(C Ring and D Ring) between the yellow foul poles is ruled a
home run
In baseball, a home run (abbreviated HR) is scored when the ball is hit in such a way that the batter is able to circle the bases and reach home plate safely in one play without any errors being committed by the defensive team. A home run i ...
. The two upper catwalks (the A Ring and B Ring) are considered in play; a ball that touches either can drop for a hit or be caught for an out.
*
Wrigley Field
Wrigley Field is a Major League Baseball (MLB) stadium on the North Side of Chicago, Illinois. It is the home of the Chicago Cubs, one of the city's two MLB franchises. It first opened in 1914 as Weeghman Park for Charles Weeghman's Chicago Wh ...
(
Chicago Cubs
The Chicago Cubs are an American professional baseball team based in Chicago. The Cubs compete in Major League Baseball (MLB) as part of the National League (NL) Central division. The club plays its home games at Wrigley Field, which is located ...
) – A
fair ball
In baseball, a fair ball is a batted ball that entitles the batter to attempt to reach first base. By contrast, a foul ball is a batted ball that does not entitle the batter to attempt to reach first base. Whether a batted ball is fair or foul ...
becoming lodged in the
ivy on the outfield fence awards two bases to the batter and all runners; if the ball falls out of the ivy, it remains in-play.
*
Citi Field
Citi Field is a baseball stadium located in Flushing Meadows–Corona Park in New York City, United States. It opened in 2009 and is the home field of Major League Baseball's New York Mets. The stadium was built as a replacement for the adjacent ...
(
New York Mets
The New York Mets are an American professional baseball team based in the New York City borough of Queens. The Mets compete in Major League Baseball (MLB) as a member of the National League (NL) East division. They are one of two major league ...
) – Any
fair ball
In baseball, a fair ball is a batted ball that entitles the batter to attempt to reach first base. By contrast, a foul ball is a batted ball that does not entitle the batter to attempt to reach first base. Whether a batted ball is fair or foul ...
in flight hitting the overhanging Pepsi-Cola sign is ruled an automatic
home run
In baseball, a home run (abbreviated HR) is scored when the ball is hit in such a way that the batter is able to circle the bases and reach home plate safely in one play without any errors being committed by the defensive team. A home run i ...
. The sign has since been changed to "Coca-Cola" following new sponsorship in 2016, and no longer overhangs. The rule has since been removed from the specific ballpark rules.
Movement of retractable roofs
These ground rules only apply at ballparks featuring retractable roofs. As of the 2021 season, these are:
Rogers Centre,
Chase Field
Chase Field, formerly Bank One Ballpark, is a retractable roof stadium in Downtown Phoenix, Arizona. It is the home of Major League Baseball's Arizona Diamondbacks. It opened in 1998 Arizona Diamondbacks season, 1998, the year the Diamondbacks ...
,
T-Mobile Park
T-Mobile Park is a retractable roof stadium in Seattle, Washington, United States. It is the home ballpark of Major League Baseball's Seattle Mariners and has a seating capacity of 47,929. It is in Seattle's SoDo neighborhood, near the western t ...
,
American Family Field
American Family Field is a retractable roof stadium used primarily for baseball. It is located in Milwaukee, Wisconsin, just southwest of the intersection of Interstate 94 and Brewers Boulevard. It is the home of Major League Baseball's ...
,
Minute Maid Park
Minute Maid Park is a retractable roof stadium in Houston, Texas, United States. It opened in 2000 as the home ballpark of Major League Baseball's Houston Astros. It has a seating capacity of 41,168, which includes 5,197 club seats and 63 ...
, and
LoanDepot Park
LoanDepot Park is a retractable roof stadium located in Miami, Florida. It is the home of Major League Baseball's Miami Marlins. It is located on on the site of the former Miami Orange Bowl in Little Havana about west of Downtown Miami. Const ...
. Rules governing batted balls striking the roof are defined in each individual ballpark's ground rules.
Universal
*The decision as to whether a game begins with the roof open or closed rests solely with the home club.
*If the game begins with the roof open:
**It shall be closed only in the event of impending rain or other adverse weather conditions. The decision to close the roof shall be made by the home club, after consultation with the
Umpire Crew Chief.
**The Umpire Crew Chief shall notify the visiting club, which may challenge the closing of the roof if it feels that a competitive imbalance will arise. In such an event, the Umpire Crew Chief shall make a final decision based on the merits of the challenge.
Ballpark-specific
All ballpark-specific retractable roof ground rules concern opening of the roof after a game has started.
If the game starts with the roof closed:
*
American Family Field
American Family Field is a retractable roof stadium used primarily for baseball. It is located in Milwaukee, Wisconsin, just southwest of the intersection of Interstate 94 and Brewers Boulevard. It is the home of Major League Baseball's ...
,
Chase Field
Chase Field, formerly Bank One Ballpark, is a retractable roof stadium in Downtown Phoenix, Arizona. It is the home of Major League Baseball's Arizona Diamondbacks. It opened in 1998 Arizona Diamondbacks season, 1998, the year the Diamondbacks ...
,
Minute Maid Park
Minute Maid Park is a retractable roof stadium in Houston, Texas, United States. It opened in 2000 as the home ballpark of Major League Baseball's Houston Astros. It has a seating capacity of 41,168, which includes 5,197 club seats and 63 ...
, &
T-Mobile Park
T-Mobile Park is a retractable roof stadium in Seattle, Washington, United States. It is the home ballpark of Major League Baseball's Seattle Mariners and has a seating capacity of 47,929. It is in Seattle's SoDo neighborhood, near the western t ...
permit its opening during the game if weather conditions warrant, as long as the following procedure is followed:
**The roof may be opened only once during the game.
**The Umpire Crew Chief will be notified at the beginning of the inning that the roof will be opened at the inning's end.
**The Umpire Crew Chief shall notify the visiting club, which may challenge the opening of the roof. In such an event, the Umpire Crew Chief shall make a final decision based on the merits of the challenge.
**The opening of the roof shall only begin between innings.
*Chase Field requires that the roof is opened in two sets of 2-minute-and-15-second intervals, at the conclusion of one inning and the conclusion of the following inning.
If the game starts with the roof open and it is closed during the game:
*American Family Field permits re-opening during the game as long as the above procedure is followed.
*At
Chase Field
Chase Field, formerly Bank One Ballpark, is a retractable roof stadium in Downtown Phoenix, Arizona. It is the home of Major League Baseball's Arizona Diamondbacks. It opened in 1998 Arizona Diamondbacks season, 1998, the year the Diamondbacks ...
,
Minute Maid Park
Minute Maid Park is a retractable roof stadium in Houston, Texas, United States. It opened in 2000 as the home ballpark of Major League Baseball's Houston Astros. It has a seating capacity of 41,168, which includes 5,197 club seats and 63 ...
,
T-Mobile Park
T-Mobile Park is a retractable roof stadium in Seattle, Washington, United States. It is the home ballpark of Major League Baseball's Seattle Mariners and has a seating capacity of 47,929. It is in Seattle's SoDo neighborhood, near the western t ...
and
Rogers Centre, once the roof is closed during a game, it shall not be reopened.
References
External links
Major League Baseball Ground RulesMajor League Baseball Official Rules
{{Baseball
Baseball rules