The team will play its home games at Sutter Health Park in West Sacramento for the 2025–2027 seasons before its planned relocation to the Las Vegas metropolitan area.

[6] The franchise's nine World Series championships, fifteen pennants, and seventeen division titles are the second-most in the AL after the New York Yankees.

The team's owner and manager for its first 50 years was Connie Mack, and Hall of Fame players included Chief Bender, Frank "Home Run" Baker, Jimmie Foxx, and Lefty Grove.

Nicknamed the "Swingin' A's", under owner Charlie O. Finley they won three consecutive World Series in 1972, 1973, and 1974, led by players including Vida Blue, Catfish Hunter, Reggie Jackson, and Rollie Fingers.

After being sold by Finley to Walter A. Haas Jr., the team won three consecutive pennants and the 1989 World Series behind the "Bash Brothers", Jose Canseco and Mark McGwire, as well as Hall of Famers Dennis Eckersley, Rickey Henderson and manager Tony La Russa.

In 2002, the Athletics set a then American League record for most consecutive wins in a season with twenty, an event that would go on to be the pioneering step in the application of sabermetrics in baseball.

[7] The history of the Athletics Major League Baseball franchise spans from 1901 to the present day, having begun in Philadelphia before moving to Kansas City in 1955 and then to its home in Oakland, California, in 1968.

The A's made their Bay Area debut on Wednesday, April 17, 1968, with a 4–1 loss to the Baltimore Orioles at the Coliseum, in front of an opening-night crowd of 50,164.

An image in Harper's Weekly with the rival Brooklyn Atlantics shows that the "A" appeared on the original Athletics' uniform as early as 1866.

[13] In 1963, when the A's were located in Kansas City, then-owner Charlie Finley changed the team mascot from an elephant to a mule, the state animal of Missouri.

In the early days of the American League, the standings listed the club as "Athletic" rather than "Philadelphia", in keeping with the old tradition.

After buying the team in 1960, owner Charles O. Finley introduced road uniforms with "Kansas City" printed on them, with an interlocking "KC" on the cap.

While in Kansas City, Finley changed the team's colors from their traditional red, white and blue to kelly green and gold.

During their dynasty years in the 1970s, the A's had dozens of uniform combinations with jerseys and pants in all three team colors, and never wore the traditional gray on the road, instead wearing green or gold, which helped to contribute to their nickname of "The Swingin' A's".

After a brief discontinuance, the A's brought back the black jersey, this time with "Athletics" written in white with gold highlights.

The nickname "A's" has long been used interchangeably with "Athletics", dating to the team's early days when headline writers used it to shorten the name.

At first, the word "Athletics" was restored only to the club's logo, underneath the much larger stylized-"A" that had come to represent the team since the early days.

Following the California Golden Seals' relocation to Cleveland in 1976, the Golden State Warriors' move across the bay to San Francisco in 2019, and the Oakland Raiders' move to the Las Vegas metropolitan area in 2020, the Athletics were left as the sole remaining professional sports team in Oakland.

Although competitive, the regional rivalry between the A's and Giants is considered a friendly one with mostly mutual companionship between the fans, as opposed to White Sox–Cubs, or Yankees–Mets games where animosity runs high.

However, the name "BART Series" has never been popular beyond a small selection of history books and national broadcasters and has fallen out of favor.

[31] Originally, the term described a series of exhibition games played between the two clubs after the conclusion of spring training, immediately prior to the start of the regular season.

[35][36] The A's won the inaugural season with the trophy, allowing them to place their logo atop its Bay Bridge stand.

During the 2002 season, the A's famous "Moneyball" tactics led them to a league record 20-game winning streak, knocking the Angels out of the first seed in the division.

During the 2004 season, the teams were tied for wins headed into the final week of September with the last three games being played in Oakland against the Angels.

Since the introduction of interleague play in 1997, the teams have since faced each other during the regular season (with the first games taking place in 2003) but the rivalry had effectively died in the intervening years since the A's left Philadelphia.

Home Run Baker *Chief Bender *Ty CobbMickey Cochrane * Eddie Collins Jimmy CollinsStan CoveleskiElmer Flick Nellie FoxJimmie Foxx *Lefty Grove *Waite HoytGeorge Kell Nap LajoieConnie Mack *Herb PennockEddie Plank * Al Simmons *Tris SpeakerRube Waddell *Zack Wheat Luke Appling Lou Boudreau Whitey HerzogTommy Lasorda Satchel Paige Enos Slaughter Dick AllenHarold BainesOrlando CepedaDennis Eckersley * Rollie Fingers *Goose GossageRickey Henderson *Catfish Hunter * Reggie Jackson *Tony La RussaWillie McCoveyJoe Morgan Dave ParkerMike PiazzaTim RainesDon Sutton Frank ThomasBilly WilliamsDick Williams Harry CarayHerb Carneal Al HelferBill King By SaamLon Simmons The Athletics have retired six numbers; additionally, Walter A. Haas, Jr., owner of the team from 1980 until his death in 1995, was honored by the retirement of the letter "A".

Questions were raised if there would be a formal ceremony after no news about a reschedule happened in 2021 before it was announced in April 2022 that Stewart would have his jersey retired on September 11, 2022.

If the team ever gets a new stadium, a physical site will be designated for the Hall of Fame, as the Coliseum does not have enough space for a full-fledged exhibit.

[47] In August 2021, it was announced that players Sal Bando, Eric Chavez, Joe Rudi, director of player development Keith Lieppman, and clubhouse manager Steve "Vuc" Vucinich would be part of the class of 2022; in November 2021, Ray Fosse, who had died the previous month, was posthumously inducted into the Hall of Fame.

In March 2004, after Veterans Stadium was replaced by the new Citizens Bank Park, the Athletics' plaques were relocated to the Philadelphia Athletics Historical Society in Hatboro, Pennsylvania,[52][53][54] and a single plaque listing all of the A's inductees was attached to a statue of Connie Mack that is located across the street from Citizens Bank Park.