Only three NCAA Division I conferences — the Ivy League, Mid-American Conference and Southwestern Athletic Conference — remained unchanged during this decade. Realignment rocked Division I from 2010 to 2015, burying one league (R.I.P. Great West Conference), staggering a handful of others, and creating new ones, including the American Athletic Conference. Special shoutout to New Mexico State, the lone school to start and end the decade still in the Western Athletic Conference.