Down go the Oklahoma Sooners! After losing their first game of the season to the unranked Missouri Tigers, coach Patty Gasso’s group was replaced by the Texas Longhorns for our No. 1 spot.

Our top 10 shook up even more after UCLA, Tennessee, Arizona and South Carolina all dropped games over the weekend. Elsewhere in the rankings, Alabama slid to No. 25, meanwhile Stanford jumped a spot, thanks to a series sweep over Notre Dame.

Here’s our ESPN.com/USA Softball Collegiate Top 25 ranking, plus our play of the week and watch to watch for in Week 7.

Play of the week

Whew! Tennessee pitcher Karlyn Pickens has officially written her name in the history books. Check out this 78.2 mph strike — the fastest recorded pitch in college softball history — she threw against Arkansas.

play

Tennessee’s Karlyn Pickens throws fastest pitch in NCAA softball history

Tennessee pitcher Karlyn Pickens fires a 78.2 mph strike for the fastest-recorded pitch in college softball history.

Player to watch

Robyn Herron, LHP, Arkansas. All eyes were on the circle this weekend in the Razorbacks’ visit to Knoxville — and rightfully so. You’ve already heard about Pickens’ record-setting heater, so let’s focus on Arkansas’ ace Herron. She tied the program record for strikeouts (16) in the first game of the series against Tennessee. In her eight-inning complete game, she only allowed four hits. Herron’s performance against the Volunteers proved that she is one of the best in the game right now.

Series to watch

No. 10 Tennessee at No. 2 Oklahoma

• Friday: 7:30 p.m. ET on SECN+

• Saturday: 2 p.m. ET on ESPN

• Sunday: 2 p.m. ET on SECN+

SEC play is in full swing, and we’re watching this matchup closely to see how both teams bounce back. Oklahoma dropped its first game of the season (but won the series) to unranked Missouri, meanwhile Tennessee lost its series against Arkansas. Expect a pitching duel between aces Pickens and Oklahoma’s ace Sam Landry. The Volunteers’ staff has held opponents to a .153 batting average, and Landry’s having a stellar season with a 1.04 ERA — 10th-best in the nation.

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Week 7 Top 25

Here is the ESPN.com/USA Softball Collegiate Top 25 ranking, plus each team’s next game.

All times Eastern.

1. Texas (17 first-place votes)

Previous rank: 2
Record: 31-2

Next game: vs. Stephen F. Austin, Tuesday at 7 p.m. on SECN+

2. Opp

Previous rank: 1
Record: 29-1

Next game: at Wichita State, Wednesday at 7 p.m. on ESPN+

3. LSU

Previous rank: 3
Record: 29-2

Next game: at Louisiana, Tuesday at 7 p.m. on ESPN+

4. Florida

Previous rank: 4
Record: 30-4

Next game: at UCF, Wednesday at 6 p.m. on ESPN+

5. Texas A&M

Previous rank: 6
Record: 26-5

Next game: vs. Sam Houston, Tuesday at 7 p.m. on SECN+

6. Oregon

Previous rank: 8
Record: 29-3

Next game: at Rutgers, Friday at 4 p.m.

7. UCLA

Previous rank: 5
Record: 28-5

Next game: at Howard, Wednesday at 6:30 p.m. on ESPN+

8. Florida State

Previous rank: 9
Record: 29-5

Next game: vs. Stetson, Wednesday at 3 p.m. on ACC Network Extra

9. Arizona

Previous rank: T10
Record: 29-5

Next game: at BYU, Thursday at 7 p.m. on ESPN+

10. Tennessee

Previous rank: 7
Record: 27-6

Next game: at Oklahoma, Friday at 7:30 p.m. on SECN+

11. South Carolina

Previous rank: T10
Record: 24-6

Next game: vs. Clemson, Tuesday at 6 p.m. on SECN+

12. Virginia Tech

Previous rank: 14
Record: 25-5

Next game: vs. Stanford, Friday at 6 p.m. on ACC Network Extra

13. Texas Tech

Previous rank: 12
Record: 24-9

Next game: at Kansas, Friday at 6 p.m. on ESPN+

14. Arkansa

Previous rank: 16
Record: 23-7

Next game: vs. Kentucky, Friday at 7 p.m. on SECN+

15 .28 SATE

Previous rank: 13
Record: 19-7

Next game: at Georgia, Wednesday at 7 p.m. on SEC Network

16. Stanford

Previous rank: 17
Record: 23-3

Next game: at Kentucky, Friday at 6 p.m. on SECN+

17. Georgia

Previous rank: 15
Record: 23-8

Next game: vs. Oklahoma State, Wednesday at 7 p.m. on SEC Network

18. Mississippi State

Previous rank: 19
Record: 27-6

Next game: at Southern Mississippi, Wednesday at 7 p.m. on ESPN+

19. Duke

Previous rank: 18
Record: 21-12

Next game: at East Carolina, Wednesday at 6 p.m. on ESPN+

20. Nebraska

Previous rank: 21
Record: 23-8

Next game: at Omaha, Friday at 6 p.m.

21. Ole Miss

Previous rank: 20
Record: 26-6

Next game: vs. Missouri, Saturday at 3 p.m. on SECN+

22. Virginia

Previous rank: 23
Record: 24-8

Next game: at Notre Dame, Friday at 6 p.m. on ACC Network Extra

23. Ohio State

Previous rank: 25
Record: 25-6-1

Next game: vs. Purdue Fort Wayne, Wednesday at 5 p.m.

24. Liberty

Previous rank: 22
Record: 27-6

Next game: vs. Longwood, Wednesday at 6 p.m.

25. Alabama

Previous rank: 24
Record: 22-12

Next game: at North Alabama, Wednesday at 7 p.m. on ESPN+