Major League Baseball's Wild Card round began in 2012, a single-game playoff between two non-division winners in each league. It was a bold move—one game, winner advances, loser goes home. The format injected instant drama into October, with teams fighting for survival in a do-or-die clash. The team with the better regular-season record hosted the game, and the winner moved on to face the top-seeded division champion in the Division Series.
This format held through 2019, producing unforgettable moments like the Royals' 12-inning comeback in 2014 and the Nationals' walk-off win in 2019 en route to a World Series title. In 2020, the COVID-shortened season prompted a temporary overhaul: MLB expanded the postseason to 16 teams, introducing a best-of-three Wild Card Series hosted entirely by the higher seed. Division winners, runners-up, and two additional wild card teams filled out the bracket.
The one-game format returned briefly in 2021, but postseason expansion followed in 2022 under a new collective bargaining agreement. MLB settled on a 12-team playoff structure: three division winners and three wild card teams per league. The top two division winners earned first-round byes, while seeds 3 through 6 faced off in best-of-three Wild Card Series. This format eliminated tiebreaker games (no more "Game 163") and emphasized regular-season performance in seeding.
Since its inception, the Wild Card round has delivered both heartbreak and heroics. The 2014 Giants and 2019 Nationals rode Wild Card wins all the way to World Series championships. Nearly every franchise has now appeared in the Wild Card round—except the Los Angeles Angels—and teams like the Rays, Yankees, and Padres have become regular contenders. Whether a single game or a short series, the Wild Card round remains one of baseball's most unpredictable and electrifying stages. Research by Baseball Almanac.
"Just five short years ago, Major League Baseball introduced an idea that would change October forever: the Wild Card Game, compressing all the nail-biting, jaw-dropping, puppy-adopting drama of the postseason into nine bonkers innings. Anything can happen. Anything definitely has." - Landers, Chris. MLB Cut 4 Member. Every Single Wild Card Game Ranked. 2 October 2017,

Did you know that the Wild Card Game record for most runs by a team, most runs by both teams, most hits by a team, and most hits by both teams, were all set during the 2017 National League Wild Card Game [Box Score]?
In November 2011, when the Collective Bargaining Agreement was adopted, the plan put forth by Major League Baseball Commissioner Bud Selig became official. The Press Release, March 2, 2012, had a full breakdown:
Major League Baseball expanded its playoffs for the third time, this time with the addition of two more Wild Card teams and a single elimination game in each league. That new format will begin this year.
An agreement between MLB and the Players Association, finalized on Friday, adds a second Wild Card to both the American and National Leagues, increasing the postseason field to 10, the largest in Major League history and the first such expansion since 1994.
The three division winners in each league will await the survivor of a one-game playoff between the Wild Card teams in each league. Both games are slated for Friday, Oct. 5, two days after the end of the regular season. Barring weather disruptions, the Division Series field of four teams in each league will begin the following Saturday and Sunday.
"I greatly appreciate the MLBPA's cooperation in putting the new postseason format in place this year," Commissioner Bud Selig said on Friday. "The enthusiasm for the 10-team structure among our clubs, fans and partners has been overwhelming.
"This change increases the rewards of a division championship and allows two additional markets to experience playoff baseball each year, all while maintaining the most exclusive postseason in professional sports."
The League Championship Series and World Series formats will remain the same, but in 2012 only, the five-game Division Series will begin with two home games for lower seeds, followed by up to three home games for higher seeds. This one-year change will eliminate a travel day prior to a decisive Game 5 of a Division Series and was necessary because the 2012 regular-season schedule -- announced before the agreement on the new postseason was reached -- had no wiggle room. There will still be a travel day between Games 2 and 3.
From 2013 onward, there will be space set into the schedule for the one-game Wild Card playoffs.
Next year, the Division Series will return to the 2-2-1 format used from 1998 through this past postseason. Details on the scheduling of the new playoff games between each league's Wild Cards will be announced in the near future as will be the television partner who will carry the games.
Reverting to the old 2-3 format that was used from 1995-97 will allow the one-game Wild Card playoff winners to remain home and host the first two games of their Division Series, which will begin on Sunday, Oct. 7. The other two Division Series that pits division winners will begin on Saturday, Oct. 6.
Division titles and Wild Card berths will now all be decided by a 163rd game play-in if necessary. In the past, if two teams were tied for a division lead after 162 games and the other had already clinched the Wild Card, the division winner would be determined by head-to-head records.
This year, any play-in games will be staged the day after the regular season ends.
In another interesting wrinkle to the new long-term playoff rule changes, beginning this year a division winner and Wild Card team from the same division will be able to meet in the Division Series, which was not the case in the past.
For example, if the Yankees have the best record in the AL and the Red Sox win their one-game Wild Card playoff, they will meet in the Division Series. In the past, the Red Sox would have played the division winner with the league's second-best record and the Yankees would've played the division winner with the third-best mark.
That happened last year when the Rays won the Wild Card and played the Rangers while the Yankees, who won the AL East, played the Tigers in the first round. Both AL East teams lost their respective Division Series. Under the new format, the Yankees would've played the Rays.
Michael Weiner, union's executive director, lauded both sides for their cooperation on a very complicated issue during a conference call on Friday.
"A bunch of players and a bunch of people on the owners' side put their heads together to try and solve the problem," he said. "There was an agreement to try and move to an expanded playoffs this year. We didn't have a schedule that was designed to accommodate it. It took a lot of hard work by both sides to try and figure out a way to make it happen."
Adding Wild Card teams this year created a logistical issue: The regular season is scheduled to end on Wednesday, Oct. 3, leaving two days for travel, weather problems, possible season-ending tiebreakers to decide division titles and Wild Card berths and the Wild Card elimination games prior to the start of the Division Series. Because of television commitments, the World Series is fixed to begin on Wednesday, Oct. 24.
The additional Wild Cards also place a premium on winning a division title. Division winners will get at least two days of rest before the start of the Division Series, while the Wild Card teams will possibly have to use their best pitchers to win an elimination game.
"If you get in [early] you can plan out your rotation a little better," D-backs manager Kirk Gibson said on Thursday. "You don't have to play the extra game. If you're in the one-game playoff, do you use your top starter, Ian Kennedy, or do use somebody else? It's a different strategy."
The new format was agreed upon last year in the new five-year Basic Agreement between the owners and the players, to start by 2013 at the latest. The two sides then had two months to negotiate the logistics of beginning it a year early. They went a day past their stated deadline.
MLB had been studying how to expand the playoffs for at least two years, and it became a topic of heated discussion among Selig's 14-member committee that has been studying on-field improvements of the sport.
"I'm excited, because it leans more heavily on the integrity of a season than the other system and I think everybody felt the same way," said Angels manager Mike Scioscia, a member of Selig's select committee. "Hopefully, it leans on that integrity a little more heavily and I think that's a good thing."
Last season, the eventual World Series-champion Cardinals made the playoffs by winning the NL Wild Card berth over the Braves on the final day of the regular season, as did the Rays over the Red Sox in the AL. Had there been the additional Wild Card berths, the four teams would've secured all of them much earlier, thus eliminating the last-minute dramatics.
Under the new scenario, the Rays would've have had to play the Red Sox and the Cardinals would have had to play the Braves in a one-game Wild Card playoff to gain entry into the Division Series.
"Everybody remembers day 162 last year and how exciting that was," said St. Louis manager Mike Matheny, a coach in the Cardinals system last season. "We all see the benefit of how the Wild Card played out. There were a lot of people against it at the time and it proved to make some very meaningful games for some teams who otherwise wouldn't have had anything going on. It will be fun to watch how it all plays out."
The previous format, featuring three division winners and a Wild Card from each league, was adopted in 1994 but wasn't actually used until the following year because a players' strike led to the cancellation of the '94 postseason. From 1969-93, there were two divisions in each league and a League Championship Series between the first-place teams as a prelude to the World Series. Prior to 1969, only the pennant winners, the first-place teams in each league, met in the World Series.
Under the new format, MLB, with 10 of 30 teams, will have the lowest amount of playoff qualifiers among the major North American sports leagues. The NFL has 12 of 32, while the NHL and the NBA each have 16 of 30.
How do you feel about the Wild Card Game? Is it now a mute issue? Could it still be made even better? Is the new format in 2022 the best one to date, or did you prefer the winner-take-all? Should another format be used? Share your opinions on our Baseball Almanac Facebook Group, on Baseball Almanac Twitter, via Baseball Almanac Messenger, or our baseball forum — Baseball Fever.