The Arizona Diamondbacks are a Major League Baseball team based in Phoenix, Arizona. The Diamondbacks are part of the National League and play in the West Division. Since beginning play in the 1998 season, the Diamondbacks called Chase Field (formerly named "Bank One Ballpark") their home. The name "Diamondbacks" was inspired by the Western diamondback snake and was chosen among thousands of entries in a contest to name the team.
Arizona made their Major League debut in the 1998 baseball season when they became the 14th expansion team. After going 65–97 in their first season, the Diamondbacks were the National League West Division Champions in the 1999 baseball season when they went 100–62. They made it to the National League Division Series but they lost to the New York Mets. The early success of the franchise was exemplified in 2001 when the Diamondbacks defeated the New York Yankees in a dramatic seven game World Series in 2001. In the 2002 baseball season, Arizona returned to the playoffs but were defeated by the St. Louis Cardinals in the National League Division Series. Post season baseball did not return to the desert until the 2007 season when Arizona lost to the Colorado Rockies in the National League Championship Series. The following season, Arizona narrowly missed the playoffs, when they finished 2 games behind the Los Angeles Dodgers. In 2011, the Diamondbacks won their division but were ousted by the Milwaukee Brewers in the National League Division Series. In 2017, the Arizona Diamondbacks finished 2nd in the NL West, and they played in the National League Wild Card Game against the Rockies. This would be the team's first appearance in the postseason as a Wild Card team. Arizona won 11–8 and played the Dodgers in the NLDS that year but were swept in 3 games. In 2023,
Table Key National League Division SeriesNational League Championship SeriesMost Valuable Player AwardCy Young AwardRookie of the Year AwardManager of the Year AwardComeback Player of the Year AwardWorld Series Most Valuable Player Award
Regular season results World Series champions †NL champions *Division champions (1969–present) ^Wild card berth (1995–present) ¤ SeasonLevelLeagueDivisionFinishWinsLossesWin%GBPostseasonAwards1998MLBNLWest5th6597331999MLBNLWest ^1st10062—Lost NLDS (Mets) 3–1Randy Johnson (CYA)2000MLBNLWest3rd857712Randy Johnson (CYA) 2001MLB †NL *West ^1st9270—Won NLDS (Cardinals) 3–2Won NLCS (Braves) 4–1Won World Series (Yankees) 4–3 †Randy Johnson (CYA, co-WS MVP)Curt Schilling (co-WS MVP)2002MLBNLWest ^1st9864—Lost NLDS (Cardinals) 3–0Randy Johnson (CYA)2003MLBNLWest3rd847816½2004MLBNLWest5th51111422005MLBNLWest2nd778552006MLBNLWest4th768612Brandon Webb (CYA) 2007MLBNLWest ^1st9072—Won NLDS (Cubs) 3–0Lost NLCS (Rockies) 4–0Bob Melvin (MOY)2008MLBNLWest2nd828022009MLBNLWest5th7092252010MLBNLWest5th6597272011MLBNLWest ^1st9468—Lost NLDS (Brewers) 3–2Kirk Gibson (MOY)2012MLBNLWest3rd8181132013MLBNLWest2nd8181112014MLBNLWest5th6498302015MLBNLWest3rd7983132016MLBNLWest4th6993222017MLBNLWest 2nd ¤936911Won NLWC (Rockies)Lost NLDS (Dodgers) 3–0Torey Lovullo (MOY)2018MLBNLWest3rd82809½2019MLBNLWest2nd8577212020MLBNLWest5th2535182021MLBNLWest5th52110552022MLBNLWest4th7488372023 MLBNL *West 2nd ¤847816Won NLWC (Brewers) 2–0 Won NLDS (Dodgers) 3–0 Won NLCS (Phillies) 4–3 Lost World Series (Rangers) 4–1Corbin Carroll (ROY)2024MLBNLWest3rd897392025MLBNLWest4th8082132026MLBNLWest3rd867614TotalsWinsLossesWin%2,2532,343All-time regular season record2829All-time postseason record2,2812,372All-time regular and postseason record
These statistics are current as of September 27, 2026. Bold denotes a playoff season, pennant or championship; italics denote an active season.
Record by decade The following table describes the Diamondbacks' MLB win–loss record by decade.
Decade Wins Losses Win % 1990s 165 159 2000s 805 815 2010s 793 827 2020s 490 542 All-time 2253 2343 These statistics are from Baseball-Reference.com's Arizona Diamondbacks History & Encyclopedia, and are current as of September 27, 2026.
Postseason appearances YearWild Card Game/SeriesLDSLCSWorld Series1999colspan=2 (Won NL West)New York Mets2001colspan=2 (Won NL West)St. Louis CardinalsAtlanta BravesNew York Yankees2002colspan=2 (Won NL West)St. Louis Cardinals2007colspan=2 (Won NL West)Chicago CubsColorado Rockies2011colspan=2 (Won NL West)Milwaukee Brewers2017colspan=2 Los Angeles Dodgers2023Milwaukee BrewersLos Angeles DodgersPhiladelphia PhilliesTexas Rangers
Post-season record by year The Diamondbacks have made the postseason seven times in their history, with their first being in 1999 and the most recent being in 2023.
YearFinishRoundOpponentResultNL West ChampionsNLDSNew York MetsLost13World Series ChampionsNLDSSt. Louis CardinalsWon32NLCSAtlanta BravesWon41World SeriesNew York YankeesWon43NL West ChampionsNLDSSt. Louis CardinalsLost03NL West ChampionsNLDSChicago CubsWon30NLCSColorado RockiesLost04NL West ChampionsNLDSMilwaukee BrewersLost23NL Wild Card ChampionsWild Card GameColorado RockiesWon10NLDSLos Angeles DodgersLost03National League ChampionsWild Card SeriesMilwaukee BrewersWon20NLDSLos Angeles DodgersWon30NLCSPhiladelphia PhilliesWon 43World SeriesTexas RangersLost147Totals8–62829
See also Arizona Diamondbacks team records List of Arizona Diamondbacks Opening Day starting pitchers
References