Norman, Okla. ? Kansas University was two outs away from a victory in its Big 12 softball opener when one swing turned the tide.

Oklahoma’s Caleigh Clifton hit a walk-off grand slam to give the No. 13 Sooners a 5-2 victory on Friday at Marita Hynes Field.

“For six innings, we did an excellent job,” KU coach Megan Smith said. “Andie (Formby) threw really well. She got herself into some jams, but fought through them early in the game and in the middle of the game. We fought really hard for six innings, and that last inning, obviously, is going to live a bad taste in our mouth.”

Kansas (19-12, 0-1) took a 2-0 lead on Taylor Dodson’s homer in the fifth. That lead held until the decisive seventh.

Formby (11-4) took the loss after surrendering five runs — four earned — off six hits over 61/3 innings.

Oklahoma improved to 24-6, 1-0.

The series will resume at 1 p.m. today.

Kansas 000 020 0 — 2 3 3

Oklahoma 000 000 5 — 5 6 0

W — Paige Parker, 12-3. L — Andie Formby, 11-4.

HR — Taylor Dodson, KU; Caleigh Clifton, OU.

Kansas highlights — Dodson 1-for-2, R, 2 RBIs.; Jessie Roane 1-for 3, R.