Cal State–Monterey Bay and Cal State–East Bay left the Cal Pac to join the NCAA Division II California Collegiate Athletic Association (CCAA) in the 2004–05 and 2008–09 seasons, respectively.
Patten University left the Cal Pac when the school chose to discontinue its athletic program after the 2004–05 season.
Notre Dame de Namur left the Cal Pac to join the NCAA Division II Pacific West Conference in the 2006–07 season, followed by Dominican in the 2008–09 season.
Mills moved to NCAA Division III as an Independent in the 2011–12 season.
In June 2011, Bethany University announced it was ceasing operations effective immediately, decreasing the Cal Pac to seven active members.[1]
Sierra Nevada approved in July 2021 an agreement to merge with NCAA Division I's University of Nevada, Reno (Nevada).[6] The merger was given accreditation approval in late December and scheduled for completion before 2022–23,[7] leading to Sierra Nevada's departure from Cal Pac.
On September 20, 2024, Cal Maritime announced it would withdraw from NAIA and Cal Pac membership at the conclusion of the 2024–25 academic year.[8]
On December 20, 2024, Northern New Mexico College and Stanton University had accepted an invite as full members to join the Cal Pac, with the latter contingent on NAIA approval for membership, while Walla Walla University accepted an invite as an affiliate member for men's volleyball; all effective beginning the 2025–26 academic year.[9]
2005 – Patten left the Cal Pac to become an NAIA Independent after the 2004–05 academic year.
2006 – Notre Dame de Namur left the Cal Pac to join the NCAA Division II ranks and the Pacific West Conference (PacWest) after the 2005–06 academic year.
2009 – Two institutions left the Cal Pac and the NAIA to join the NCAA Division II ranks and to their respective new home primary conferences: Cal State–East Bay (CSUEB) to the CCAA, and Dominican (Cal.) to the PacWest after the 2008–09 academic year.
2014 – William Jessup left the Cal Pac to join the Golden State Athletic Conference (GSAC; now the Great Southwest Athletic Conference) after the 2013–14 academic year.
2015
Menlo left the Cal Pac to join the GSAC after the 2014–15 academic year.
2021 – Sierra Nevada left the Cal Pac at the end of the 2021–22 academic year as the school announced plans to merge with the University of Nevada, Reno, dropping all athletic programs in the process.
2022 – Marymount California left the Cal Pac after the 2021–22 academic year as the school announced its closure in August of that year.
2023
Benedictine at Mesa, Embry-Riddle Prescott, Park–Gilbert, and Saint Katherine all left the Cal Pac to join the GSAC, beginning the 2024–25 academic year.
UC Merced announced it would be leaving the Cal Pac and the NAIA to join the NCAA Division II ranks and the CCAA, beginning the 2025–26 academic year.
2024
Antelope Valley left the Cal Pac during the 2023–24 academic year as the school suddenly closed after an order from the state of California to cease operations.
St. Katherine left the Cal Pac during the 2023–24 academic year ahead of its planned departure to the GSAC, as the university announced it would cease all operations at the end of the academic year.
2025
La Sierra and Soka will leave the Cal Pac to join the GSAC, beginning the 2025–26 academic year.
Cal Maritime will leave the Cal Pac and the NAIA via withdrawal at the conclusion of the 2024–25 academic year, coinciding with the school's integration into Cal Poly San Luis Obispo.