The Sooners, winners of six of the last seven Big 12 softball championships, have taken their historic success to the SEC, leaving a massive vacuum in their former conference alongside Big 12 defector Texas.

Much like March Madness, teams can earn berths in the NCAA regionals by winning their conference tournaments. The rest of the 64-team field will be chosen by the NCAA softball committee. Teams with impressive runs in the conference tournaments can bolster their resumes, so it’s an important week for all teams. Here’s what you need to know: