In a rematch of last season's WCWS Championship, No. 10 Oklahoma will open play in the Super Regionals Friday afternoon at No. 7 Auburn.
Paige Parker fired a shutout, while Macey Hatfield and Nicole Mendes provided solo homers to propel the Sooners into the Super Regionals.
Down to their last at-bat, the Sooners used a pair of home runs from Caleigh Clifton and Sydney Romero to top Tulsa in 10 innings, 6-4.
Tenth-seeded Oklahoma posted a 10-2, six-inning run-rule victory over North Dakota State Sunday to reach the Regional championship.
Tenth-seeded Oklahoma kept its season alive with a 5-3 win over Arkansas and earned a Sunday rematch with North Dakota State.
Due to rain and lightning Friday's NCAA Regional between Oklahoma and North Dakota State has been suspended until Saturday at 1:30 p.m.
No. 10 seed Oklahoma saw its 16-game win streak in Regional play end Saturday in a 3-2, nine-inning loss to North Dakota State.
Update - 3:30 p.m. - After multiple rain delays, Oklahoma and North Dakota State are scheduled for a 4:11 first pitch
Oklahoma softball had seven student-athletes, including five first-teamers, named to the 2017 NFCA Division I All-Central Region Team.
The defending national champion OU softball team has earned the No. 10 overall seed and will host an NCAA Regional in Norman.
Nicole Pendley hit a two-run homer and Paige Parker and Paige Lowary combined on a shutout as OU won the Big 12 Championship, 2-0.
Four home runs and a third straight shutout carried top-seeded Oklahoma past sixth-seeded Texas Tech at the Big 12 Championship, 8-0.