EDMOND, Okla. -- Nathalie Timmermans did so much damage in the opening game that the senior slugger didn’t get a chance to swing in the second contest, but it didn’t matter as No. 6 Central Oklahoma swept a doubleheader from Truman State on Sunday.

Timmermans drove in a school-record nine runs in a thrilling 12-8 first-game win, capping it with a dramatic grand slam in the bottom of the seventh inning.  She drew a walk in all three at bats in the nightcap, but scored all three times as Kacie Edwards had four RBIs and Rachael Steverson threw a four-hitter in a 9-0 run-rule shutout.

UCO extended its Division II-best winning streak to 29 consecutive with the sweep, improving to 31-3 on the season and a perfect 15-0 at home.

“It didn’t look very good for us in the first game, but we didn’t give up and the girls found a way to get it done,” head coach Genny Stidham said.  “Nathalie came through with a bunch of clutch hits for us and after we pulled out the first game we were a lot more relaxed in the second.”

Timmermans had a three-run homer in the first inning of the opener to stake the Bronchos to a quick 3-0 lead and that held up until the fourth when Truman pushed across five runs.

It remained a 5-3 deficit until the sixth, when UCO erupted for four runs.  Timmermans again had the key hit, this time a two-run double that put the Bronchos in front, and Megan Whitmire’s sacrifice fly made it 7-5.

The Bulldogs answered back in the top of the seventh, using three hits and a key error to score three runs and move in front 8-7.

But UCO was up to the task in its final at bat.

Hannah Justus started the winning rally with a one-out single before Devyn Frazier and Kaylee Brunson drew back-to-back walks to tie it.  Kayce Raines then tied it with a single off the left fielder’s glove to bring Timmermans to the plate.

And Timmermans delivered, hammering an 0-2 pitch over the center field fence for the game-winner. It was the 17th homer of the season for the senior catcher, extending the school record she set on Saturday.

Timmermans’ 3-for-5, nine-RBI performance led a 13-hit attack, while Raines, Edwards, Justus and Frazier added two hits each. 

There was no drama in the second game, with UCO taking a 2-0 lead in the first on Edwards’ two-run double and extending that to 6-0 in the third as Edwards, Whitmire and Brittany Weaver all had RBI singles.

The Bronchos upped the lead to 9-0 in the fourth as Raines, Edwards and Weaver had run-scoring hits and Steverson gave up just a bunt single in the fifth before closing out the run-rule victory.

Steverson, who also earned the win in the first game, improved to 16-2 with the victory.  She scattered four hits while walking just one and striking out two in her 12th complete-game outing of the season.

Edwards went 3-for-3 with four RBI to pace the offense, with Raines, Whitmire and Weaver collecting two hits apiece.

UCO goes on the road for its next six games, starting with a Tuesday doubleheader against Cameron in Lawton.