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{{Short description|Quarterfinals of the MLB postseason}}{{Use mdy dates|date=September 2024}} {{Use American English|date=September 2024}}
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The '''Division Series''' is the [[quarterfinal]] round of the [[Major League Baseball]] [[Major League Baseball postseason|postseason]]. Four series are played in this round, two each for both the [[American League]] and the [[National League (baseball)|National League]].

==1981 season==
The first use of the term "Division Series" dates from [[1981 Major League Baseball season|1981]], when due to a mid-season players' [[1981 Major League Baseball strike|strike]], that season was divided into two halves, with the winners of each half from each division (West and East at the time) playing one another in a [[best-of-five playoff|best-of-five series]] to decide which team would represent that division in the [[League Championship Series]] (this format being common in minor-league baseball). But because the two halves of the season were independent of one another, the winner of the first half had no real incentive to try to win the second half as well (since, unlike in the minor leagues, if the same team did win both halves it was not given a bye into the next round), and a team that won neither half could have actually had the best overall record in the division; indeed, the latter actually occurred, as the [[1981 Cincinnati Reds season|Cincinnati Reds]] and the [[1981 St. Louis Cardinals season|St. Louis Cardinals]] had the two best won-lost records (in both halves of the season combined) in the National League West and East respectively, with the Reds having the best overall winning percentage in all of Major League Baseball, yet neither advanced to the playoffs because they finished second in their divisions in each half. Until the 2012 format revision, this was the only Division Series which actually consisted of teams from the same division playing each other. This particular Division Series was meant as a one-off series due to the strike.

==1993–1994: Proposal, realignment, and cancellation of 1994 postseason==
In [[1993 Major League Baseball season|1993]], the owners approved the reintroduction of the Division Series, this time on a permanent basis,<ref>{{cite web |url=https://www.mlb.com/news/baseball-postseason-format-changes |title=Complete history of baseball’s postseason formats |last=Castrovince |first=Anthony |publisher=Major League Baseball |date=October 4, 2022 |website=mlb.com |access-date=March 14, 2023 |quote=MLB’s 1994 realignment to three divisions per league (East, Central and West) was paired with the creation of a Wild Card postseason spot in each league (giving the postseason an even number of teams) and a permanent version of the “quarterfinal,” best-of-five Division Series.}}</ref> given the fact that three of the four series in the one-off 1981 Division Series went to a game 5.<ref>[https://news.google.com/newspapers?id=MKlAAAAAIBAJ&sjid=luYFAAAAIBAJ&pg=5508,4817255&dq=expand+playoffs&hl=en Owner Approve to Expand Playoffs to 8 teams] ''[[The Milwaukee Journal Sentinel]]''</ref>  Originally, the format called for the top team in the [[American League East|AL East]] to play the 2nd place team in the [[American League West|AL West]] and vice versa. In [[1994 Major League Baseball season|1994]], both the [[National League (baseball)|National League]] and the [[American League]] realigned, with the number of divisions in both increasing from two to three (adding a Central Division, with fewer teams in each division).  At the same time, the number of teams qualifying for baseball's postseason was doubled, from four to eight; henceforth the three first-place teams from each league's divisions would reach the postseason, along with one [[wild card (sports)|wild card]] team from each league (the latter being the second-place finisher with the best regular-season record).  However, this expanded playoff format did not return until the following year, because a players' [[1994 Major League Baseball strike|strike]], which began on August 12, 1994, led to the cancellation of that season's playoffs and [[1994 World Series|World Series]] (and caused the [[1995 Major League Baseball season|1995]] regular season to have 18 fewer games for each team than the standard 162 [for a total of 144 games]).

==1995–1997: Pre-arranged seeding==
Since its inception, the Division Series has been [[Best-of-five playoff|best-of-five]]; however, both the method of awarding home-field advantage in the series and which games the team getting the advantage would host were changed in [[1998 in baseball|1998]].

Originally, the East, Central, and West Division champions rotated home-site priority, with two division winners getting the extra home game, and third one not having the extra game along with the wild-card team, who never had it. The 2–3 format was used in which the disadvantaged team hosted the first two games, and the team with the advantage hosted the remaining game(s). This made it impossible for the disadvantaged team to clinch the series at home. A similar format had been used for the [[League Championship Series]] from 1969 to 1984. It also allowed the disadvantaged teams the unusual luxury of starting a series at home, and a guarantee that they play two games at home, whereas the advantaged team may play only one game at home if the series ends in a three-game sweep.

==1998–2011==
The two division champions with the best regular-season records have been accorded with the home-field advantage, forcing the worst division winner to play an extra road game. Also, the format changed to a 2–2–1 layout with the team having home-field advantage hosting Games 1, 2, and (if necessary) 5.<ref>{{Cite web|title=Baseball Changes Playoff Format|url=https://apnews.com/article/6e0bf2b95e33d2a45a2751b417ce0c31|access-date=2021-04-08|website=AP NEWS}}</ref><ref>{{Cite news |last=Chass |first=Murray |date=1998-09-20 |title=BASEBALL: NOTEBOOK; 3 Playoff Teams Are Packed Up and Ready to Go, but to Where? |language=en-US |work=The New York Times |url=https://www.nytimes.com/1998/09/20/sports/baseball-notebook-3-playoff-teams-are-packed-up-and-ready-to-go-but-to-where.html |access-date=2023-03-09 |issn=0362-4331}}</ref><ref>{{Cite web |last=Archives |first=L. A. Times |date=1998-03-20 |title=Change in Playoff Format Becomes a Matter of Record |url=https://www.latimes.com/archives/la-xpm-1998-mar-20-sp-31009-story.html |access-date=2023-03-09 |website=Los Angeles Times |language=en-US}}</ref> In both the AL and the NL, the three division champions were automatically given the top three seeds, seeded #1–3 based on record, and the wild-card was given the 4th seed regardless of record. In both the AL and the NL, the #1 seed played the #4 seed and the #2 seed played the #3 seed, unless the #1 and #4 seed were in the same division. Because teams from the same division couldn't play each other in the first round, if the normal matchups would cause this, then the #1 seed played the #3 seed, and the #2 seed played the #4 seed. In all cases, the top two seeds had home-field advantage.

From 2007–2011, the #1 seed of the league that won the [[Major League Baseball All-Star Game|All-Star Game]] was given another advantage. In addition to earning home-field advantage throughout the entire playoffs, they were allowed to choose their schedule for the series. They could either choose to have an extra day off (usually between games 1 and 2) during the series and start a day early, or start a day late, with one less off day (only having travel days off, between games 2 and 3, and if necessary 4 and 5). The American League's best record received this option from 2007–2009 and the National League's best record received it in 2010.<ref>[http://mlb.mlb.com/mlb/schedule/ps.jsp?y=10 2010 MLB Postseason Schedule] ''[[MLB.com]]''</ref>

==2012–2019, 2021==
A revised playoff system was utilized beginning with the [[2012 Major League Baseball season|2012 season]], which added a second wild-card team for each league. The two wild card teams in each league played a [[Major League Baseball wild card round|one game playoff]] to advance. The winner of this game advanced to play the #1 seed in the league in the Division Series, regardless of whether the two teams were in the same division. Because the format was added well after the regular season schedule was announced, the 2012 Division Series used a 2–3 format. From 2013 to 2021, the Division Series used the 2–2–1 format previously used.<ref name="Addition of">{{cite web|url=http://mlb.mlb.com/news/article.jsp?ymd=20120229&content_id=26927024&vkey=news_mlb&c_id=mlb|title=Addition of Wild Card berths finalized for 2012|first=Barry M.|last=Bloom|work=MLB.com|date=March 2, 2012}}</ref>

==2020==
The {{MLBy|2020}} postseason was modified from its usual format due to the temporary expansion of the playoffs for the 60-game regular season. After a best-of-three Wild Card Series, the winners of the 1/8 matchup faced the winners of the 4/5 matchup while the 2/7 faced the 3/6. Each of the four matchups were played in consecutive days at neutral sites, with the usual 2–2–1 structure used to determine the designated home teams. When every team from the Central divisions lost, it meant that all four Division Series matchups would feature teams from the same division playing each other (i.e. East playing East and West playing West), the first occasion of this happening since 1981.

==Since 2022==
With the expansion of the postseason to six teams per league since the {{MLBy|2022}} season, only the two best division winners earn byes to the Division Series. The wild card round was expanded to a best-of-three series and the winners of that round advance to the Division Series. In this round, the #1 seed faces the 4/5 winner, and the #2 seed plays the 3/6 winner; the bracket does not re-seed.<ref>{{Cite web |title=MLB playoff picture: Bracket, standings, new format explained with 12-team postseason field set |url=https://www.cbssports.com/mlb/news/mlb-playoff-picture-bracket-standings-new-format-explained-with-12-team-postseason-field-set/ |access-date=2023-01-02 |website=CBSSports.com |language=en}}</ref><ref>{{Cite web |title=2022 MLB playoffs: New postseason format explained, and why there are no more Game 163 tiebreakers |url=https://www.cbssports.com/mlb/news/2022-mlb-playoffs-new-postseason-format-explained-and-why-there-are-no-more-game-163-tiebreakers/ |access-date=2023-01-23 |website=CBSSports.com |language=en}}</ref><ref name=":3">{{Cite web |title=New MLB postseason format, explained |url=https://www.mlb.com/news/mlb-playoff-format-faq |access-date=2023-03-09 |website=MLB.com |language=en}}</ref><ref>{{Cite news |last=Kepner |first=Tyler |date=2022-10-06 |title=Baseball’s Postseason Is Evolving, for Better or Worse |language=en-US |work=The New York Times |url=https://www.nytimes.com/2022/10/06/sports/baseball/wild-card-postseason-preview.html |access-date=2023-03-09 |issn=0362-4331}}</ref><ref name="12teamplayoff">{{Cite web |title=Everything you need to know about '22 season |url=https://www.mlb.com/news/mlb-2022-season-faq |access-date=2022-03-10 |website=MLB.com |language=en}}</ref>

==Criticism of scheduling==<!-- This section is linked from [[American League Division Series]] -->
There has been some criticism on how Major League Baseball schedules Division Series games. Teams with large national fan followings like the [[New York Yankees]] are almost always scheduled to play in [[prime time]] at 8 p.m. [[North American Eastern Time Zone|ET]]/5 p.m. [[Pacific Time Zone|PT]] to generate the highest [[Nielsen ratings|TV ratings]]. As a result, [[West Coast of the United States|West Coast]] teams generally have to play on the road in the afternoon, when many of their fans are unable to watch the game because they are at work or school.<ref>
{{cite web | title=Mailbag: Was Penny the right choice?
|url=http://losangeles.dodgers.mlb.com/NASApp/mlb/news/article.jsp?ymd=20061004&content_id=1699937&vkey=news_la&fext=.jsp&c_id=la
|first=Jim
|last=Street
|work=[[MLB.com]]
|date=2006-10-04
|access-date=2006-10-07
}}{{dead link|date=October 2024|bot=medic}}{{cbignore|bot=medic}}</ref><ref>{{cite news | title=Blame it on TV — but not always Baseball, too, wants top draw for prime time
|url=http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2005/10/14/SPG6VF85SR1.DTL&hw=baseball+playoffs+Yankees+schedule+prime+time&sn=001&sc=1000
|first=Steve
|last=Kroner
|newspaper=[[San Francisco Chronicle]]
|date=2005-10-14
|access-date=2006-10-07
}}</ref> Conversely, when games on the West Coast are played at 10 p.m. ET/7 p.m. PT, many fans on the East Coast are unable to watch a game in its entirety, due to work or school the next day and games ending around 1 a.m. ET/10 p.m. PT, while most West Coast fans are able to watch the entire game as it will not end as late on the West Coast.

However, in 1995, (as aforementioned, the 1994 series was not played due to the strike), the Division and League Championship Series was aired by the league's television operation, [[The Baseball Network]], a joint syndication package between ABC and NBC. In order to increase viewership, all games were played in primetime at consistent times, and each affiliate of the network carrying the series could only air one of the games each night, determined by the station's area. While this prevented the issue of afternoon games (and did, as planned, increase viewership), the plan drew ire from critics for not allowing viewers to choose the games they want to watch during the post-season.<ref name="whosonroutine">{{cite news |title=TV'S COVERAGE OF PLAYOFFS A 'WHO'S ON?' ROUTINE  |url=http://nl.newsbank.com/nl-search/we/Archives?p_product=PG&p_theme=pg&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EADF8364A4D1DFC&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM |newspaper=Pittsburgh Post-Gazette |date=1 October 1995 |access-date=31 May 2011}}</ref><ref>{{cite news |title=Baseball strikes out - again Series: TV / RADIO; FANFARE |author=Hooper, Ernest |url=https://pqasb.pqarchiver.com/sptimes/access/21327998.html?dids=21327998:21327998&FMT=ABS&FMTS=ABS:FT&type=current&date=Sep+29%2C+1995&author=ERNEST+HOOPER&pub=St.+Petersburg+Times&desc=Baseball+strikes+out+-+again+Series%3A+TV+%2F+RADIO%3B+FANFARE&pqatl=google |archive-url=https://archive.today/20130201001105/http://pqasb.pqarchiver.com/sptimes/access/21327998.html?dids=21327998:21327998&FMT=ABS&FMTS=ABS:FT&type=current&date=Sep+29,+1995&author=ERNEST+HOOPER&pub=St.+Petersburg+Times&desc=Baseball+strikes+out+-+again+Series:+TV+/+RADIO;+FANFARE&pqatl=google |url-status=dead |archive-date=February 1, 2013 |newspaper=St. Petersburg Times |date=29 September 1994 |access-date=31 May 2011 }}</ref>

==See also==
{{Portal|Baseball}}
*[[Major League Baseball division winners|MLB division winners]]
*[[American League Division Series]]
*[[National League Division Series]]
*[[Major League Baseball postseason|MLB postseason]]
*[[Wild Card Series]]
*[[League Championship Series]]

==References==
{{reflist}}

==External links==
*[https://web.archive.org/web/20110713112351/http://www.joesportsfan.com/?p=2491 Top 7 :: Division Series Moments]

{{ALDS}}
{{NLDS}}

[[Category:Major League Baseball postseason]]
[[Category:Recurring events established in 1995]]
[[Category:October in sports]]
[[Category:Annual events in Major League Baseball]]