Kansas sophomore pitcher Hannah Todd winds up to throw in a game against Oklahoma, Sunday, April 14, 2019, at Arrocha Ballpark.

Oklahoma senior infielder Sydney Romero erased any doubts from general managers of the National Pro Fastpitch League still deciding on who their first round selection should be on Monday in Nashville.

Romero, a 2018 NFCA All-American, went a combined 5-for-9 at the plate, reaching on walk twice with two doubles, a home run and three RBIs in the Sooners’ weekend series against Kansas.

“I thought we did a great job against her,” Kansas coach Jennifer McFalls said. “Obviously, she’s going to get her hits, (and) she’s just as good defensively for them as she is at the plate.”

No. 2 Oklahoma’s four home runs were enough to seal an 8-0 run-rule win in six innings over Kansas Sunday afternoon at Arrocha Ballpark. The Jayhawks (14-27, 2-7 Big 12) were unable to score any runs in the series, which included two shortened games, and recorded a total of five hits.

The Sooners (38-2, 9-0) swept their third Big 12 foe of the season.

Kansas freshman right hander Lexy Mills (6-7) opened the game surrendering three early runs. Mills gave up a leadoff walk to Romero, who later scored on a three-run homer by Caleigh Clifton.

“I’ve been telling our pitching staff that we need to make them earn it,” McFalls said. “If they’re going to hit the ball hard, then obviously their earning their runs that way. I’d much rather see them earn it than us giving them free passes with extra walks.”

Hannah Todd came in relief for Mills to allow five hits over her five innings of work, throwing three shutout innings.

Oklahoma’s Grace Green hit a leadoff homer to open the fifth inning to give the Sooners a four run lead. In the next inning, Romero hit a solo shot in the sixth and Green hit her second of the game.

“It’s hard to keep Oklahoma quiet offensively for that long,” McFalls said. “When you face a team like Oklahoma, you need to have a pitching staff. You’re not going to beat them with one or two great pitchers.”

Becki Monaghan, Morgyn Wynne and Miranda Rodriguez each had a hit for Kansas Sunday. All three came against Shannon Saile (8-1), who had allowed less than three hits in all but three of her 19 appearances in the circle entering Sunday.

Kansas travels to Texas Tech at 6 p.m. Thursday.

OKLAHOMA 8, KANSAS 0

OU: 300 014 X – 8 8 0

KU: 000 000 X – 0 3 1

W: Saile (8-1); L: Mills (6-7).