Inland Empire 66ers

The 66ers began when the Salinas Spurs moved to San Bernardino and bought the name of the San Bernardino Spirit from the Rancho Cucamonga Quakes who had just left town. The team was bought by Elmore Sports Group soon afterwards. The team originally played at Fiscalini Field until 1996 when the team moved to San Bernardino Stadium, nicknamed "The Ranch" in concert with the team's new name, the San Bernardino Stampede.

Later, the stadium was re-christened San Manuel Stadium sponsored by the San Manuel Band of Mission Indians with their casino.

In 2003, a competition was held to determine a new name for the organization. Season ticket holder Phil Westbook's proposal for a team representing the Inland Empire ultimately led to the team's current name, the Inland Empire 66ers of San Bernardino.^[2]

In September 2006, the 66ers announced they were renewing their affiliation with the Los Angeles Dodgers beginning in the 2007 season. That affiliation lasted through the 2010 season.

In September 2010, the 66ers agreed to a two-year affiliation to be the Los Angeles Angels' High-A affiliate.

At one time, the team had a National Public Radio affiliate, KVCR-FM, broadcasting its games on radio. However, in 2008, the team changed to commercial talk station KCAA.^{[citation needed]}

In conjunction with Major League Baseball's restructuring of Minor League Baseball in 2021, the 66ers were organized into the Low-A West at the Low-A classification.^[3] They retained their affiliation with the Angels.^[4] In 2022, the Low-A West name was replaced with the California League, the name historically used by the regional circuit prior to 2021, and was reclassified as a Single-A circuit.^[5]

On March 27, 2024, the club announced Diamond Baseball Holdings had purchased the team.^[6] On December 15, following the sale of the Modesto Nuts franchise to Diamond Holdings, it was announced the 66ers would become the Class-A affiliate of the Seattle Mariners beginning in 2026. The move consisted of the 66ers assuming the place of the Nuts in a de facto relocation of the Modesto team, which ceased operations following a failure to pay for improvements to Modesto's stadium; the previous incarnation of the 66ers moved to Rancho Cucamonga, assuming the identity of the Rancho Cucamonga Quakes; and that team relocated to a new stadium in Ontario, California, becoming the Ontario Tower Buzzers.^[7]

• 
  The dance team performing on the field
• 
  The team at Lake Elsinore Diamond in 2012
• 
  San Manuel Stadium

• San Bernardino Spirit (1993–1995)
• San Bernardino Stampede (1996–2002)
• Inland Empire 66ers (2003–present)