STILLWATER, Okla. -- One day after clinching an unprecedented eighth consecutive Big 12 regular-season championship, Oklahoma softball tied an NCAA mark to add to its 2019 résumé.

In completing a sweep of rival Oklahoma State with two wins Sunday, the No. 1-ranked Sooners tied an NCAA Division I record with 38 consecutive victories. Over a single season, only the 1997 South Carolina team won as many games in a row. Arizona holds the overall record for consecutive wins with 47, but that covered two seasons (1996-97).

"They just impress me beyond belief," Sooners coach Patty Gasso said. "They haven't felt a loss in a while. And I think they don't want to. And that motivates them. I can't tell you how proud I am of this team, their accomplishments."

The Sooners opened the Bedlam series with Saturday's 3-0 victory in Norman behind Giselle Juarez's one-hit gem. Juarez struck out 13 Cowgirls to move to 21-0 on the year.

In Sunday's doubleheader in Stillwater, the Sooners leaned on the long ball. Sydney Romero's two-run homer in the third inning ignited Oklahoma to a 7-1 victory in the first game. Then, Jocelyn Alo and Grace Green connected on back-to-back home runs in the first inning of the second game, propelling the Sooners past Oklahoma State 6-1.

By rolling through No. 12 Oklahoma State, the Sooners (48-2) also finished 18-0 in Big 12 play for a second consecutive season. The Big 12 tournament in Oklahoma City begins next weekend, and the Sooners will open against Texas Tech (3 p.m. ET Friday) with a chance to break the Division I consecutive wins record.

"Anytime I say there's a chance they can't do something, they show me they can," Gasso said. "It's a different kind of team. They act, they feel, their style is very invincible."

Oklahoma's last lost came on Feb. 22, 7-1 to UCLA.

The Sooners were knocked out of the Women's College World series in the semifinals last year but captured back-to-back national championships in 2016 and 2017. The 2019 bracket will be unveiled May 12.