Brittney Griner had 18 points with nine rebounds and No. 1 Baylor extended its winning streak to 13 in a row with a 70-39 victory over Oklahoma State on Saturday night.

Odyssey Sims 15 points on 5-of-6 shooting with three 3-pointers for the Lady Bears (16-1, 3-0 Big 12), whose overall winning streak matches the 13 in a row they have also won at home. Melissa Jones added 10 points and eight rebounds.

It was another lopsided conference loss for the Cowgirls (12-4, 0-3), who lost 82-57 against No. 7 Texas A&M earlier this week after losing their Big 12 opener by 18 to Kansas State. Their only other loss was by 28 points against third-ranked Duke last month.

And they never had much of a chance against the Lady Bears.

Baylor, whose only loss was by one point at then top-ranked Connecticut in November, entered leading the nation with a scoring margin of 34.5 points while holding opponents to less than 31-percent shooting. Toni Young had 12 points and was the only player in double figures for the Cowgirls, who shot only 25 percent (16 of 64).

The Lady Bears never trailed, taking the lead for good when Jones hit a 3-pointer from the left side on the opening possession of the game. After Lindsey Keller followed a 15-footer with a 3-pointer to make it 12-8, Oklahoma State never got closer.

Jones had a steal, and chest-bumped a teammate after missing the layup in traffic. Though she missed both free throws, she made up for it quickly with her other 3-pointer of the game — when she passed the ball to Sims, who quickly returned it to set Jones up on the right side for a 15-8 lead.

Sims then stretched the lead to 10 when she took a pass from Griner and hit a 3-pointer from the left wing.

Baylor pushed the lead to 33-13 with 3:13 left in the first half when Hayden hit a pair of free throws. Right after that, Jones stole the ball from Young in front of the Oklahoma State bench and passed to Destiny Williams for a driving layup. She also added the free throw after being fouled for the largest lead before halftime.

When Lakyn Garrison drove for what looked like would be an easy layup just before halftime, the 5-foot-5 guard had her shot swatted into the courtside seats by Griner. That was one of Griner's three blocks.

That was just how the night went for the Cowgirls, whose only other game against a No. 1 team was a 74-59 loss against Louisiana Tech in 1989 when Kim Mulkey was still an assistant coach for her alma mater.

Mulkey is in her 11th season as coach for the Lady Bears, who are 156-19 at home during that span with wins in 100 of their last 109 games.

Griner was recognized before the game for reaching 1,000 career points in the Lady Bears' previous game, a win Wednesday at Texas that just her 51st career game. She also became No. 2 in Big 12 career blocks in that game, with more than 300.

Through 52 games, Griner has 1,018 career points. Her 306 blocked shots trail only former Oklahoma standout Courtney Paris' 446 on the Big 12 career list.