Oklahoma Baptist left the Sooner and the NAIA to join the NCAA Division II ranks and the GAC after the 2014-15 academic year. 2015 - Bacone College joined the Sooner in the 2015-16 academic year. 2017 - St. Gregory's (Okla.) left the Sooner as the school announced that it would close at the end of the fall 2017 semester during the 2017-18 academic year. 2017 - Central Christian College of Kansas and Oklahoma Panhandle State University joined the Sooner in the 2017-18 academic year. 2017 - Five institutions joined the Sooner as associate members: Indiana Institute of Technology (Indiana Tech) and Lourdes University for men's wrestling, while the University of Houston–Victoria, the University of the Southwest and the University of St. Thomas for women's golf, all effective in the 2017-18 academic year. 2018 - Langston University joined the Sooner in the 2018-19 academic year. 2018 - Five institutions joined the Sooner as associate members: Arizona Christian University, Lyon College, Ottawa University–Arizona and Texas College for football, and Rochester University for men's wrestling in the 2018-19 academic year. 2019 - Bacone left the Sooner to become an NAIA Independent as part of the Association of Independent Institutions (AII) after the 2018-19 academic year. 2019 - St. Thomas (Tex.) left the Sooner as an associate member for women's golf, as the school announced to move up to the NCAA Division III ranks and the Southern Collegiate Athletic Conference (SCAC) after the 2019 spring season (2018-19 academic year). 2019 - Cleary University joined the Sooner as an associate member for men's wrestling, while Lyon added women's wrestling to its Sooner associate membership, both effective in the 2019-20 academic year. 2020 - Cleary, Indiana Tech, Lourdes and Rochester left the Sooner as associate members for men's wrestling after the 2019-20 academic year. 2020 - The University of North Texas at Dallas joined the Sooner as a provisional member for some sports in the 2020-21 academic year. 2021 - North Texas–Dallas has upgraded to full membership within the Sooner in the 2021-22 academic year. 2021 - Louisiana College (now Louisiana Christian University) joined the Sooner as an associate member for football in the 2021 fall season (2021-22 academic year). 2022 - Lyon announced that it will leave the Sooner and the NAIA as an associate member for football to join the NCAA Division III ranks after the 2022 fall season (2022-23 academic year). 2022 -