A victory Saturday would clinch the conference championship for the Sooners.
So, too, would a Missouri loss.
As for this day, OU took care of business, and in a big way.
Five days removed from surrendering their highest totals of the season in 12 runs and 15 hits to arch-rival Texas, pitcher Keilani Ricketts and the Sooners were crisp, posting a two-hit shutout while pounding out 10 runs on 11 hits of their own.
First baseman Lauren Chamberlain got the offense going, blasting a two-run shot in the top of the third.
Second baseman Georgia Casey then, after Ricketts walked, sent a scorching double to right to make it 3-0.
OU added three more in the fifth to leap out to a 6-0 lead.
First, third baseman Javen Henson ripped a solo shot, then Ricketts hit a double and Casey mashed a two-run shot to right for her second and third RBIs of the day.
The first three Sooner batters in the seventh reached base before catcher Jessica Shults capped off the scoring by blasting her sixth career grand slam, the 81st home run of the season for OU, which now sits four shy of the record 85 the 2000 National Championship team set.
Casey paced the Sooner offense, going 2-for-3 with three RBIs and two runs scored.
Ricketts picked up her 27th win of the season to just six setbacks, dealing 10 strikeouts and only one walk and two hits.
The two get back to action with a 2 p.m. first pitch before concluding the series at 12 p.m. Sunday.