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Ground rule double
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==Application== [[Major League Baseball]] (MLB) has a set of '''universal ground rules''' that apply at all ballparks, two of which award two bases to the batter and any baserunners:<ref>{{cite web |url=https://www.mlb.com/groundrules |title=Universal Ground Rules |website=[[MLB.com]] |access-date=April 15, 2020}}</ref> * A batted ball lodged in the roof above fair territory (unless outlined otherwise in the home park ground rules) * Any batted ball in fair territory that, in flight, strikes the facing of a lower wall and then bounds over a higher wall [[File:Wrigley Field 400 foot sign.jpg|thumb|left|Batted balls lodged in the [[Wrigley Field ivy]] are ground rule doubles.]] Two bases can also be awarded per '''home park ground rules'''βrules created to provide for unique playing conditions of a specific ballpark. For example, ground rules govern the situation when a batted ball is lodged in the [[Wrigley Field ivy|ivy]] at [[Wrigley Field]],<ref>{{cite news |title=Wrigley Field Ivy Has an Appetite for Baseballs|first=Paul|last=Sullivan|url=http://www.chicagotribune.com/sports/columnists/ct-wrigley-field-ivy-appetite-for-baseballs-20151021-column.html|newspaper=[[Chicago Tribune]]|date=October 21, 2015|access-date=February 27, 2017}}</ref> or the walkways near the ceiling of [[Tropicana Field]], a domed stadium.<ref>{{cite web |url=https://www.youtube.com/watch?v=NC3_G9XMvFU |archive-url=https://ghostarchive.org/varchive/youtube/20211222/NC3_G9XMvFU |archive-date=2021-12-22 |url-status=live|title=J.D. Martinez Robbed of Home Run by Tropicana Field Catwalk |date=2015 |via=YouTube |access-date=April 15, 2020}}{{cbignore}}</ref> The far more commonly occurring automatic double results from the generally applicable MLB rules 5.05(a)(6) through 5.05(a)(9).<ref name=RULES>{{cite web |url=https://img.mlbstatic.com/mlb-images/image/upload/mlb/ub08blsefk8wkkd2oemz.pdf |title=Official Baseball Rules |date=2019 |via=mlbstatic.com |publisher=Office of the Commissioner of Baseball |access-date=April 15, 2020}}</ref>{{rp|22β23}} These rules govern how to treat the batter (and any runners on base) when a batted ball is hit fair but passes out of the field of play or becomes artificially obstructed while in the field of play. For example, these rules cover balls that hit the ground in fair territory and land out of play, typically by bouncing over a fence or wall in the outfield. The rules also provide generically for the award of a double when a batted ball goes through or under a fence; and when it goes through or sticks in shrubbery or vines on the fence. [[File:Bill Miller and Fredi Gonzalez in Arlington in September 2014.jpg|thumb|right|Runners advance two bases from their location ''at the time of pitch'' on a ground rule double; umpires can only award more than two bases in certain instances of [[Interference (baseball)|interference]].]] MLB rule 5.05(a)(9) governs when fair fly balls are deflected into the stands by a fielder: "Any fair fly ball is deflected by the fielder into the stands, or over the fence into foul territory, in which case the batter shall be entitled to advance to second base; but if deflected into the stands or over the fence in fair territory, the batter shall be entitled to a home run. However, should such a fair fly be deflected at a point less than {{convert|250|ft|m}} from home plate, the batter shall be entitled to two bases only."<ref name=RULES/>{{rp|23}} When two bases are awarded by either ground rules or the automatic rule, any [[baserunner]]s ahead of the batter are entitled to advance two bases from their positions at the [[time of pitch]]. Only in the case of [[Interference (baseball)|interference]] is the umpire vested with discretion to award more bases (see MLB rule 6.01).<ref name=RULES/>{{rp|63β69}} Application of the ground rule or automatic double rule can result in a runner at first base, who appears to have been able to score on a batted ball, being required to return to third base due to the ball going out of play.<ref>{{cite news |url=https://www.cbssports.com/mlb/news/umpires-should-have-discretion-on-ground-rule-doubles/ |title=Umpires should have discretion on ground-rule doubles |first=Matt |last=Snyder |website=[[CBS Sports]] |date=October 21, 2015 |access-date=April 15, 2020}}</ref><ref>{{cite web |url=http://www.youtube.com/watch?v=GZno6CAKCFk&t=8m59s |archive-url=https://ghostarchive.org/varchive/youtube/20211222/GZno6CAKCFk |archive-date=2021-12-22 |url-status=live|title=New York Mets at Chicago Cubs NLCS Game 3 Highlights October 20, 2015 |via=[[YouTube]] |access-date=April 15, 2020}}{{cbignore}}</ref>
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