The NCAA Division I Softball Championship begins on Friday and Oklahoma is the top seed.
The NCAA Division I Softball Committee selected the field on Sunday.
The SEC had the most teams selected to compete in the tournament with 12.
The first ever appearances in the tournament will be by Grand Canyon University, North Texas, Murray State and UNC Wilmington.
Oklahoma lost to Oklahoma State in the final of the Big 12 Championship on Saturday and is looking to bounce back.
The Sooners, who lead the country in both batting average and earned run average, will play Prairie View at home.
Oklahoma State won its first conference title in program history and was given a 7 seed.
The top 16 seeds host regionals from Friday to Sunday, with the winners moving on to the super regionals.
The Women's College World Series will be in Oklahoma City.
Oklahoma is looking to win in consecutive seasons for the second time in program history, after beating Florida State to win last year's CWS.
The Sooners have won five national titles under head coach Patty Gasso, who was selected to the National Fastpitch Coaches Association Hall of Fame in 2012
Oklahoma is one of only six teams to win multiple titles, and it trails only UCLA and Arizona in total titles.