A Double-A baseball game between the New Hampshire Fisher Cats and Altoona Curve at Delta Dental Stadium in Manchester, New Hampshire, in August 2016

Double-A (officially Class AA[1]) is the second-highest level of play in Minor League Baseball in the United States since 1946, below only Triple-A. There are currently 30 teams classified at the Double-A level, one for each team in Major League Baseball, organized into three leagues: the Eastern League, the Southern League, and the Texas League.


Jigger Statz, pictured in 1922, played in over 2700 Minor League Baseball games, all at the Double-A level in the Pacific Coast League between 1920 and 1942

Class AA ("Double-A") was established in 1912, as the new highest classification of Minor League Baseball.[2] Previously, Class A had been the highest level, predating the establishment of the National Association of Professional Baseball Leagues—the formal name of Minor League Baseball—in 1901.[3]: 15  Entering the 1912 season, three leagues were designated as Class AA:[3]: 236 

Each of these leagues had previously been in Class A.[3]: 230  Each remained in Class AA through 1945,[3]: 396  then moved into Class AAA ("Triple-A") when it was established in 1946.[3]: 15  No other leagues were designated Class AA during 1912–1945, although a Class A1 level (between Class A and Class AA) was established in 1936.[3]: 15 

The contemporary Double-A classification, as the second-highest level in Minor League Baseball, was established in 1946. Entering that season, the three aforementioned leagues in Class AA all moved to the newly established Triple-A, and Class A1 became Double-A with two leagues:[3]: 401 

The Texas League remained in Double-A for the next 75 years. During this time, there were limited changes to leagues at the Double-A level:

Entering the 2020 minor league season (which was not played, due to the COVID-19 pandemic) the Texas League had been in Double-A since 1946, the Eastern League since 1963, and the Southern League since 1964. Prior to the 2021 season, Major League Baseball (MLB) reorganized the minor leagues. At that time, the existing leagues were temporarily renamed: Eastern League as Double-A Northeast, Southern League as Double-A South, and Texas League as Double-A Central. Following MLB's acquisition of the rights to the names of the historical minor leagues, MLB announced on March 16, 2022, that the leagues would revert to their prior names, effective with the 2022 season.[4]


In August 1985, after playing for several Double-A level teams, Jeff Hearron was signed by the Toronto Blue Jays of Major League Baseball

The Double-A classification usually hosts developing players that have been part of professional baseball for only a couple of years. These players can get to the Double-A level by earning a promotion from any of the lower-level leagues,[5] with Class A-Advanced ("High-A") being immediately below Double-A in the minor league hierarchy.

The step up to the Double-A level can be one of the hardest promotions for such players because it is the level at which pitchers need to have a good off-speed pitch in their repertoires. In addition, it is the level where fastball-only hitters need to learn how to hit off-speed pitches, or their hopes of advancing to the majors will diminish.[6] Some players may be placed in Double-A to begin their minor league careers, usually veterans from foreign leagues or top prospects out of college. Additionally, major league clubs sometimes send players to their Double-A team to rehabilitate from injuries.[5]

While Triple-A is the highest level in the minor leagues, players may also advance to the major leagues directly from Double-A. For example, within the Toronto Blue Jays organization, 17 position players were promoted from Double-A directly to MLB during 1978–2018;[7] approximately one player every two seasons. As players at the Double-A level are, generally, still improving their skills, it could be argued that the pure talent level is higher in Double-A than Triple-A, where there may be some stagnation of talent.[6]

Because players are not often moved back and forth from their major league parent club as often happens in Triple-A, the rosters of Double-A teams tend to be more stable.[8] Fans of Double-A teams thus have a longer amount of time to get acquainted with the players, which helps create a better relationship between the team and its fans.[8]

Current teams

Double-A (baseball) is located in the United States
Current Double-A team locations:
  Texas League
  Eastern League
  Southern League

Texas League

Main article: Texas League

Division Team MLB Affiliation City Stadium Capacity
North Arkansas Travelers Seattle Mariners North Little Rock, Arkansas Dickey–Stephens Park 7,200[9]
Northwest Arkansas Naturals Kansas City Royals Springdale, Arkansas Arvest Ballpark 7,305[10]
Springfield Cardinals St. Louis Cardinals Springfield, Missouri Hammons Field 10,486[11]
Tulsa Drillers Los Angeles Dodgers Tulsa, Oklahoma ONEOK Field 7,833[12]
Wichita Wind Surge Minnesota Twins Wichita, Kansas Riverfront Stadium 12,000
South Amarillo Sod Poodles Arizona Diamondbacks Amarillo, Texas Hodgetown 6,631[13]
Corpus Christi Hooks Houston Astros Corpus Christi, Texas Whataburger Field 7,679[14]
Frisco RoughRiders Texas Rangers Frisco, Texas Riders Field 10,316[15]
Midland RockHounds Oakland Athletics Midland, Texas Momentum Bank Ballpark 6,669[16]
San Antonio Missions San Diego Padres San Antonio, Texas Nelson W. Wolff Municipal Stadium 9,200

Eastern League

Main article: Eastern League (1938–present)

Division Team MLB Affiliation City Stadium Capacity
Northeast Binghamton Rumble Ponies New York Mets Binghamton, New York Mirabito Stadium 6,012[17]
Hartford Yard Goats Colorado Rockies Hartford, Connecticut Dunkin' Park 6,121[18]
New Hampshire Fisher Cats Toronto Blue Jays Manchester, New Hampshire Delta Dental Stadium 6,500[19]
Portland Sea Dogs Boston Red Sox Portland, Maine Hadlock Field 7,368[20]
Reading Fightin Phils Philadelphia Phillies Reading, Pennsylvania FirstEnergy Stadium 9,000[21]
Somerset Patriots New York Yankees Bridgewater Township, New Jersey TD Bank Ballpark 6,100[22]
Southwest Akron RubberDucks Cleveland Guardians Akron, Ohio Canal Park 7,630[23]
Altoona Curve Pittsburgh Pirates Altoona, Pennsylvania Peoples Natural Gas Field 7,210[24]
Bowie Baysox Baltimore Orioles Bowie, Maryland Prince George's Stadium 10,000[25]
Erie SeaWolves Detroit Tigers Erie, Pennsylvania UPMC Park 6,000[26]
Harrisburg Senators Washington Nationals Harrisburg, Pennsylvania FNB Field 6,187[27]
Richmond Flying Squirrels San Francisco Giants Richmond, Virginia The Diamond 9,560[28]

Southern League

Main article: Southern League (1964–present)

Division Team MLB Affiliation City Stadium Capacity
North Birmingham Barons Chicago White Sox Birmingham, Alabama Regions Field 8,500[29]
Chattanooga Lookouts Cincinnati Reds Chattanooga, Tennessee AT&T Field 6,362[30]
Rocket City Trash Pandas Los Angeles Angels Madison, Alabama Toyota Field 7,000[31]
Tennessee Smokies Chicago Cubs Kodak, Tennessee Smokies Stadium 6,412[32]
South Biloxi Shuckers Milwaukee Brewers Biloxi, Mississippi Keesler Federal Park 6,076[33]
Mississippi Braves Atlanta Braves Pearl, Mississippi Trustmark Park 8,480[34]
Montgomery Biscuits Tampa Bay Rays Montgomery, Alabama Montgomery Riverwalk Stadium 7,000[35]
Pensacola Blue Wahoos Miami Marlins Pensacola, Florida Community Maritime Park 5,038[36]


Prior to the 2021 reorganization of the minor leagues, all three active Double-A leagues played split seasons, with the Eastern League moving to that system in 2019. Teams winning their division in either half of the season qualified for the postseason, with wild card teams filling out the remaining spots in a bracket tournament, usually composed of four teams.[37][38][39]

On June 30, 2021, Minor League Baseball announced that the top two teams in each league (based on full-season winning percentage, and regardless of division) would meet in a best-of-five postseason series to determine league champions.[40]

All-Star Games

Prior to the 2021 reorganization of the minor leagues, each of the active Double-a leagues held its own midseason All-Star Game.[41] From 1991 to 2002, the three combined to hold the Double-A All-Star Game between teams of American League-affiliated All-Stars and National League-affiliated All-Stars.[42][43]

After the start of the 2021 minor league season was delayed by a month,[44] team schedules were released without a break for an all-star game.[45]


See also: Baseball awards § Double-A

Pace-of-play initiatives

As a part of pace-of-play initiatives implemented in 2015, 20-second pitch clocks entered use at Double-A stadiums in 2015.[46] In 2018, the time was shortened to 15 seconds when no runners are on base. Other significant changes implemented in 2018 included beginning extra innings with a runner on second base and limiting teams to eight mound visits during a nine-inning game.[47] In 2019, the number of mound visits was reduced to seven, and pitchers were required to face a minimum of three consecutive batters, unless the side is retired or the pitcher is injured and unable to continue.[48]

See also


  1. ^ The Official Professional Baseball Rules Book (PDF). New York City: Office of the Commissioner of Baseball. 2021. p. 10. Retrieved May 1, 2021 – via mlbpa.org.
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  3. ^ a b c d e f g h i j k l Lloyd Johnson; Miles Wolff, eds. (2007). The Encyclopedia of Minor League Baseball (Third ed.). Baseball America. ISBN 978-1932391176.
  4. ^ "Historical league names to return in 2022". milb.com. Minor League Baseball. March 16, 2022. Retrieved March 29, 2022.
  5. ^ a b "What is Double AA Baseball?". SportingCharts. 2014. Retrieved March 19, 2015.
  6. ^ a b Moore, Jeff (July 2, 2013). "Understanding Minor League Levels". The Hardball Times. Retrieved March 18, 2015.
  7. ^ Hunter, Ian (May 11, 2018). "Flashback Friday: Blue Jays Position Players Who Leapt From Double-A to MLB". bluejayhunter.com. Retrieved April 14, 2021.
  8. ^ a b Santelli, Robert; Santelli, Jenna (2010). The Baseball Fan's Bucket List: 162 Things You Must Do, See, Get, and Experience Before You Die. Running Press. p. 218. ISBN 9780762438556.
  9. ^ "Dickey-Stephens Park". Arkansas Diamonds: The Ballparks of Arkansas and Their History. Archived from the original on May 5, 2015. Retrieved September 22, 2017.
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  11. ^ Mock, Joe. "Hammons Field in Springfield, Missouri". Baseball Parks. Retrieved September 22, 2017.
  12. ^ "ONEOK Field". Tulsa Sports Commission. 2010. Retrieved May 4, 2015.
  13. ^ Reichard, Kevin (April 10, 2019). "Sod Poodles Launch Crowd-Pleasing Ballpark". Ballpark Digest. August Publications. Retrieved April 10, 2019.
  14. ^ Goldberg-Strassler, Jesse (November 19, 2012). "Whataburger Field / Corpus Christi Hooks". Ballpark Digest. Retrieved May 4, 2015.
  15. ^ Goldberg-Strassler, Jesse (November 14, 2012). "Dr Pepper Ballpark / Frisco RoughRiders". Ballpark Digest. Retrieved May 4, 2015.
  16. ^ "Security Bank Ballpark". Stadiums USA. Archived from the original on May 8, 2016. Retrieved September 22, 2017.
  17. ^ Knight, Graham (September 17, 2010). "NYSEG Stadium". Baseball Pilgrimages. Retrieved May 4, 2015.
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  19. ^ "2012 New Hampshire Fisher Cats Media Guide" (PDF). Minor League Baseball. April 9, 2012. Retrieved May 4, 2015.
  20. ^ Knight, Graham (July 6, 2010). "Hadlock Field – Portland Sea Dogs". Baseball Pilgrimages. Retrieved May 4, 2015.
  21. ^ Leon, Matt (May 17, 2011). "Minor League Ballpark Guide". KYW. Philadelphia. Retrieved May 4, 2015.
  22. ^ "TD Bank Ballpark". MiLB.com. Retrieved 2024-05-10.
  23. ^ "Akron RubberDucks Canal Park". Minor League Baseball. November 27, 2012. Retrieved September 27, 2017.
  24. ^ "2012 Altoona Curve Media Guide". Minor League Baseball. 2012. Retrieved May 4, 2015.
  25. ^ "Bowie Baysox Baysox/Stadium Info". Minor League Baseball. March 11, 2009. Retrieved May 4, 2015.
  26. ^ "Jerry Uht Park". Erie County Convention Center Authority. Archived from the original on July 30, 2012. Retrieved August 3, 2012.
  27. ^ Reichard, Kevin (June 28, 2010). "Metro Bank Park / Harrisburg Senators". Ballpark Digest. Retrieved May 4, 2015.
  28. ^ O'Connor, John (March 27, 2010). "Bleacher Banners Give Diamond New Look, Fewer Seats". Richmond Times-Dispatch. Retrieved February 23, 2014.
  29. ^ "Regions Field Birmingham Barons". Minor League Baseball. January 27, 2012. Retrieved May 4, 2015.
  30. ^ Knight, Graham (July 27, 2010). "AT&T Field". Baseball Pilgrimages. Retrieved May 4, 2015.
  31. ^ Gattis, Paul (April 15, 2019). "Countdown is on: 1 year from today until first Trash Pandas game in Madison". AL.com. Retrieved September 5, 2019.
  32. ^ Reichard, Kevin (May 1, 2015). "Smokies Park / Tennessee Smokies". Ballpark Digest. Retrieved May 4, 2015.
  33. ^ Harris, Chris (February 12, 2015). "A Walking Tour of MGM Park". Minor League Baseball. Retrieved May 4, 2015.
  34. ^ "Mississippi Braves Stadium Information". Minor League Baseball. November 13, 2008. Retrieved May 4, 2015.
  35. ^ "Riverwalk Stadium Information". Minor League Baseball. February 25, 2013. Retrieved May 4, 2015.
  36. ^ Pillon, Dennis (April 20, 2012). "Pensacola's Class AA Baseball Fever Still Going Strong". Press-Register. Mobile. Retrieved May 4, 2015.
  37. ^ "Texas League Playoff Procedures". Retrieved March 28, 2015.
  38. ^ "Eastern League Playoff Procedures". Retrieved March 28, 2015.
  39. ^ "Southern League Playoff Procedures". Retrieved March 28, 2015.
  40. ^ Heneghan, Kelsie (June 30, 2021). "Playoffs return to the Minor Leagues". MiLB.com. Retrieved July 1, 2021.
  41. ^ "Important Dates". Minor League Baseball. Retrieved April 24, 2020.
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  43. ^ Gonzalez, Roberto (July 11, 2002). "End Comes in Seventh". Hartford Courant. Hartford. p. C1 – via Newspapers.com.
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  46. ^ Jackson, Josh (January 15, 2015). "Triple-A, Double-A to Implement Pitch Clock". MILB.com. Retrieved April 20, 2015.
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