NCAA Division I baseball tournament

The NCAA Division I Baseball Championship is held each year from May through June and features 64 college baseball teams in the United States, culminating in the eight-team Men's College World Series (MCWS) at Charles Schwab Field Omaha in Omaha, Nebraska.

The tournament is unique in that it features four tiers of competition, alternating between double-elimination brackets and best-of-three series. In fact, throughout the entire 64-team tournament, a team can lose a total of four games and still be crowned champions.

Format
During team selection, the top 16 of the 64-team field are given "national seeds". As in other NCAA tournaments, conference champions (usually determined by a tournament) receive automatic bids, and the selection committee fills the remaining spots.

The first round of the tournament, called Regionals, consists of 16 locations that include four teams, seeded 1 through 4, competing in a double-elimination bracket. The 16 national seeds are given the No. 1 seed in their assigned regional. The host sites are determined largely by merit – most national seeds host – but are also contested by bids from schools guaranteeing the NCAA a certain amount of revenue from that regional. Host teams traditionally have a large advantage, although the home team for each game is determined by rule, so the host school sometimes plays as the visiting team.

The regionals are paired together as in a typical 16-team bracket tournament; the regional containing the No. 1 national seed is paired with the regional containing the No. 16 national seed, that containing the No. 2 national seed with that containing the No. 15 national seed, and so forth. This creates the matchups for the second round of competition, the Super Regionals, which are a best-of-three series between the winners of each paired regional.

The Super Regionals are typically hosted by the higher national seed in the regional pairing. If that team does not advance, but the lower national seed advances, the Super Regional will be played at that team's field. If neither of the two advancing teams are national seeds, they will bid for hosting rights. Although one school hosts all three games, the teams split home-team status in the first two games, with the host school batting last in the opening game and first in game 2. If a third game is needed, a coin toss determines home-team status.

The eight Super Regional winners meet in Omaha, Nebraska, in the Men's College World Series. The MCWS mimics the earlier rounds, consisting of two double-elimination brackets of four teams each. Thereafter, the winners of each bracket meet in a best-of-three final. The winner of this final series wins the MCWS and is crowned the national champion. The school with the most national champions is USC with 12, though the Trojans have not won one since 1998, and have not appeared in the World Series at all since 2002. They are followed by LSU, with 7 national champions between 1991 and 2023.

Team titles
The following table shows the total national championships won by school, as well a map of all champions.

Appearances
The following tables show the total appearances in the NCAA Tournament by school. The official NCAA record only includes the District playoff games starting in 1954, so only the top 8 teams from earlier years appear on this table. This may not align with every individual school's media guide.

Appearances by team
Total Columns
 * School refers to the current name and branding of the baseball team.
 * Conference shows where the school as of the 2024 season.
 * Total appearances in the NCAA Tournament, not counting vacated appearances.
 * Finished in the top 16 of the tournament: top 2 in a District or Regional (1950 through 1998) or won a Regional (1999 to present). Prior to 1966, some Districts would just select a representative straight into the College World Series, so some years may not have 16 teams with this designation.
 * Total appearances in the College World Series
 * National championships

Table Entries
 * National champion
 * National runner-up
 * Played in the College World Series with the given placement. All World Series since 1950 have had 2 teams finish in 5th and two teams finish in 7th. Since 1988, all have had 2 teams finish in 3rd, but before then, some years would have separate 3rd and 4th place teams, depending on how the bracket played out.

1947 through 1949
 * The College World Series did not have a full 8-team bracket in these years. Eight teams played in a playoff, with different formats by year, with only 2 or 4 teams advancing to the College World Series.
 * Lost in the playoff, finished 3rd in the nation
 * Lost in the playoff, finished 5th in the nation
 * Lost in the playoff, finished 7th in the nation

1950 through 1974
 * District tournaments used varying formats through the years, with anywhere from 1 to 6 teams playing in a single-elimination, double-elimination, or other format. Some formats allowed teams to tie for a place.
 * 2nd place in District tournament
 * 3rd place in District tournament
 * 4th place in District tournament
 * 5th or 6th place in District tournament

1975 through 1998
 * Regional tournaments consisted of 4-team or 6-team double elimination brackets. Depending on how the tournament played out, there could be two teams tying for 3rd place, or separate 3rd and 4th place teams. Many 6-team brackets include a tie for 5th place.
 * 2nd place in Regional tournament
 * 3rd place in Regional tournament
 * 4th place in Regional tournament
 * 5th or 6th place in Regional tournament

1999 to present
 * All regional tournaments consist of 4-team double elimination brackets, with distinct placements for every team. The 16 Regional winners faced off in Super Regionals, with 8 winners advancing to the College World Series.
 * Lost in the Super Regionals (1999 to present)
 * 2nd place in Regional tournament
 * 3rd place in Regional tournament
 * 4th place in Regional tournament

From 1982 through 1986, the NCAA identified the top 5 teams and slotted them into separate Regionals. Those teams are shown in with. From 1987 through 1998, all eight Regionals included a top seed, which are also shown with. Starting in 1999, there were 16 Regionals, and the top 8 national seeds are shown with, while the next 8 seeds are shown with single underline. These seeded teams are not always the host of the Regional, but in recent years, the list of hosts aligns very closely to the list of top seeds.

1947
The first tournament was an 8 team single elimination tournament. Four teams each were put into two playoff brackets, named the "Eastern playoff" and the "Western playoff." The winner of each bracket moved on to the College World Series, which was, at that time, a 2 team best-of-three-game series.

1948
The second year of the tournament maintained the "Eastern playoff" and "Western playoff" format, however, they were now double elimination. The winner of each bracket moved on to the College World Series to play a best-of-three-game series.

1949
The third year of the tournament consisted of four regions named Region A, Region B, Region C, and Region D. Each region consisted of two teams playing in a best-of-three-game series. The winner of each region moved on to the College World Series, which was now a four-team double-elimination tournament.

1950–1953
From 1950 through 1953, the preliminary rounds were not managed by the NCAA but rather by the district colleges, and thus these games are not recorded in the official history books of the NCAA. The winner of each district managed playoff (although some districts did not have playoffs and chose to select their teams by committee) were sent to the College World Series, which was an eight-team double-elimination tournament. The 1950 event was the first in Omaha, where it has remained.

1954–1974
From 1954 through 1974 the tournament consisted of eight districts, named by number. Each consisted of between two and five teams playing in differently formatted tournaments. Some years included automatic College World Series qualifiers, and that team played no district games; for an example see 1959. The winner of each district moved on to the College World series, which was double-elimination.

1975
The first year of the regional format was 1975. Eight regionals consisted of four teams in a double-elimination tournament. The winner of each regional moved on to the College World Series, also double-elimination.

1976–1981
The tournament essentially remained unchanged from the 1975 version, however, one regional consisted of six teams in a double-elimination tournament, with four teams in each of the other seven regionals. The winner of each regional moved on to the College World Series, also double-elimination.

1982–1987
The tournament expanded again in 1982—to 36 teams—to include two regionals with six teams while the other six regionals only had four teams. The Regionals remained double-elimination with the winners moving onto the College World Series, also double-elimination.

Subsequently, the tournament field expanded to 38 teams in 1985, 40 teams in 1986, and 48 teams in 1987.

1988–1998
From 1988 through 1998, the NCAA tournament featured 48 teams, which contested in eight regionals of six teams each for the right to go to the College World Series.

1999–2017
The four-team regional format and the best-of-three super regional format debuted in 1999, with the expansion of the tournament to 64 teams.

The best-of-three championship series at the College World Series debuted in 2003 after CBS ceased coverage of the "one-off" College World Series championship game. This allowed the NCAA to institute the best-of-three series for the finals, which better mimics the traditional three-game series played during the regular season and makes a pitching staff's depth a key factor. ESPN and ESPN2 now cover the entire CWS. After 61 years at Johnny Rosenblatt Stadium, the College World Series moved to the new TD Ameritrade Park in 2011.

2018
For the first time, the 2018 NCAA Division I baseball tournament seeded the top 16 teams, rather than only the top 8 teams as had been the practice since 1999. This ensures that the regional featuring top ranked team will be paired with the regional hosted by the sixteenth seeded team, where the previous Super Regionals qualifiers were paired generally along geographical lines. ESPN, ESPN2, ESPNU, SEC Network, & ESPN3 covered every regional. Longhorn Network also covers games that Texas hosts for people in Texas for regionals but featured on ESPN3 since Longhorn Network is an ESPN sports network only in Texas. All Super Regionals are on ESPN, ESPN2 & ESPNU. However they are mainly on ESPN2 & ESPNU. The CWS is on ESPN & ESPN2.

National seeds
In 1999, the NCAA began awarding eight teams with a national seed. These teams automatically host a super regional if they advance past the regional round, unless their facilities are considered inadequate by the NCAA and thus do not bid to host, or their home stadium is unavailable because of scheduling conflicts; in some cases, a team may share a stadium with a minor league professional baseball team, or if their stadium does not meet NCAA requirements, host the event at the professional team's stadium. The former was the case for Cal State Fullerton in 1999, as its ballpark lacked the required seating capacity and media facilities at the time. In 2015, Missouri State was unable to host because of scheduling conflicts with the minor-league team whose off-campus ballpark it used. In 2018, the NCAA expanded the national seeds to 16 teams, guaranteeing the lower seed the ability to host the super regional if the higher seed does not advance.

Gray Shade and Italics indicates team made the Men's College World Series. Bold Italics indicates team won the Men's College World Series.

Regional and Super Regional Hosts (1999–present)
Starting in 1999, the NCAA expanded to a 64-team format with a regional and subsequent super regional round, with the winners of the super regionals advancing to the MCWS. The tournament begins with 16 double-elimination regional sites of four teams each; the NCAA seeds the teams 1–4 and announces the host school and venue, which is generally hosted by the highest seeded team in the region at their home stadium. The winners of each regional (16 teams) advance to the super regional round, divided into eight super regional locations, each with two teams facing off in a best-of-three series; once again, the NCAA announces the host site between rounds, and each super regional is generally hosted by the higher-seeded of the two teams.

Teams must submit a bid for hosting rights. At times, the host venue has been hosted at a venue of the highest seed's choosing that is not its home field, or hosted by a team that is not the highest team in the region, due to a number of factors including scheduling conflicts at the highest team's home venue, the host school's home venue being inadequate to host according to NCAA criteria, the host school not submitting a bid, and severe weather.


 * Italicized venues indicates a host venue that is not the primary home stadium of the host team.
 * Bold indicates the host team won the series.
 * An asterisk (*) indicates that the host school was not the highest seeded team in that year's regional or super regional.

Attendance
The highest single-game attendance for an NCAA Super Regional was at Dudy Noble Field, Polk-Dement Stadium at Mississippi State University. On Saturday, June 12, 2021, 14,385 watched Mississippi State beat Notre Dame 9–8 in game 1 of a best of 3. The second highest was set the day after as 13,971 fans saw Notre Dame even the series with a 9–1 victory. For the decisive Monday game, 11,784 fans saw the Bulldogs defeat the Fighting Irish 11–7 to send Mississippi State on to the College World Series. This set the overall Super Regional at 40,140, breaking the former record of 35,730 set when Arkansas hosted Missouri State in a Super Regional in 2015. The highest for an off-campus facility was set at Zephyr Field, a minor-league park in New Orleans. In 2001, Tulane and LSU battled for 3 games in front of 34,341 fans.

The highest single-game attendance for an NCAA Regional game was also set at Mississippi State; 11,511 watched Mississippi State vs Central Michigan on June 1, 2019. For total attendance during a Regional series, LSU holds the top 2 spots at 67,938 in 1998 and 66,561 in 1997. Mississippi State holds the next three to round out the top 5--64,723 in 1997, 63,388 in 1989, and 62,191 in 1990. All of those Top 5 regional attendance records were set under the old six-team Regional format.

Longest game in college baseball history
The longest college baseball game was a 2009 regional game between Boston College and host Texas on May 30 in Austin. Texas won 3–2 in 25 innings, which lasted over seven hours.

The third-longest game in tournament history occurred in a 2012 regional game between Kent State and Kentucky at U.S. Steel Yard in Gary, Indiana, where Kent State won 7–6 in 21 innings.