CEFCU stadium officially opened in 1933 as a 4,000-seat facility. The stadium featured large berms on the east, west, north and south sides of the field, which gave the stadium a "sunken bowl" appearance. The stadium's seating capacity was increased to 8,500 in 1936, and later expanded incrementally to a total seating capacity of just over 18,000 by 1948. The most recent additions came in the 1980s when the capacity of the stadium was expanded from approximately 18,000 to just over 31,000 by adding end zone bleachers, an upper deck and boxes on the west side. In 1998, the field was widened and other renovations were carried out for the San Jose Earthquakes soccer team in accordance with official
FIFA regulations. As a result of these renovations, parts of the stands closest to the playing field were removed, thus lowering available seating for all sports to 30,456. On January 13, 2007, the
San Jose Mercury News reported that the city of San Jose, San Jose State University and the San Jose Earthquakes owners were in negotiations to demolish Spartan Stadium and
build a new stadium just to the east. The new facility, to have 22,000 permanent seats but be expandable to a capacity of 30,000 for single games, would have been privately built by
Lewis Wolff and
John Fisher, the primary owners of the Earthquakes, with San Jose State providing the needed land. Additionally, the team and the university would build community soccer fields across Senter Road in
Kelley Park using San Jose municipal bond money that had been approved years earlier for the purpose but never spent. The plan was for the new version of the San Jose Earthquakes to play in Spartan Stadium during the 2008 MLS season, then move into the new stadium in 2009. Plans for the stadium collapsed on April 19, 2007 after the Earthquakes and SJSU could not come to an agreement on revenue sharing. Seating capacity remained at 30,456 until 2019, when it was temporarily reduced to 21,520 as part of a massive east-side stadium renovation project that included construction of the $70 million Spartan Athletic Center. In August 2016,
Citizens Equity First Credit Union purchased sole naming rights to Spartan Stadium for $8.7 million. The deal between CEFCU and San José State University will last for 15 years. SJSU was the first university in the
California State University system and second university in the state of California to strike such a deal. The CEFCU sponsorship deal marked the third such arrangement among the 12
Mountain West Conference football members. The $8.7 million payout will primarily be used for athletic scholarships, athletics operations, and athletics facilities.
Spartan Athletics Center and east-side renovations A CEFCU Stadium east-side building addition was completed in August 2023 at an approximate cost of $70 million. Known as the Spartan Athletics Center, the 55,000 square-foot, multi-story facility houses a new football operations center, locker rooms, offices, meeting and training rooms and a sports medicine center. The facility also includes soccer team offices and locker rooms, as well as dining and hospitality facilities, event spaces and premium viewing areas. The east-side stadium renovation has temporarily reduced seating capacity at CEFCU Stadium from just over 30,000 to 21,520. Approximately 9,000 seats were removed from the stadium in 2019 to make way for the new building. This includes virtually all of the east-side stadium seating and some of the north end zone bleachers. The north end zone bleachers were removed to make way for construction of a new state-of-the-art video scoreboard and outdoor bar and lounge area. The new scoreboard was completed in 2020. As of 2023, a second phase of the east-side building and renovation project remains in the planning stages. The second phase is aimed at replacing spectator seating that was removed to make way for the SAC. ==Other uses==