FEDERAL WAY, Wash. — Mackenzie Miller Lung broke her own school record twice on the way to securing the 2025 Big 12 200 breast title with a dominant win of over three seconds on Saturday at Weyerhaeuser King County Aquatics Center.
“I was really nervous that I was going to completely burn out but, with the help of my team, I was able to be calm and trust myself,” said Miller Lung. “Being a Big 12 Champ doesn’t feel real. I’ve dreamed about this all year long and it’s crazy to have cashed in on my hard work.”
Miller Lung started the day strong with a win of nearly two seconds in a personal-best 2:09.20 in the 200 breast prelim. Immediately after meeting the water in Saturday night’s final, Miller Lung established herself as the race’s leader. The junior breaststroker recorded splits of 1:00.46 and 1:06.07 while clearing the competition well before the flags in a win of 3.28 seconds. Houston’s Flo Peter and Nina Vadovicova of TCU followed Miller Lung in second and third, respectively.
Miller Lung not only secured BYU women’s swim and dive’s first ever Big 12 individual title but became the first Cougar women’s swimmer to win an conference championship since Brynn Sproul in 2022.
A junior from Clovis, California, Miller Lung now ranks seventh nationally in the 200 breast, ahead of athletes from the likes of swimming bluebloods Tennessee, Virginia and Indiana.
Miller Lung’s 200 breast championship was a fitting finish to her accomplished week in Federal Way that included three All-Big 12 First Team placements, five school-record shattering individual races and a part in two school record-rewriting relays.
With wins in both Saturday’s 200 breast prelim and final, Miller Lung brought her season tally to 16 race victories.
Overall, BYU women’s swim and dive finished the 2025 Big 12 Championships in seventh with 722.5 team points. The Cougars’ accomplishments at Weyerhaeuser King County Aquatic Center featured nine all-conference performers, including five first finishes. BYU rewrote 10 school records, including four of five relays. Sixteen program top 10 times were set by BYU women, half of which were credited to freshmen. Together, the Cougars compiled 49 personal best times.
| 2025 Big 12 Women's Swim & Dive Championships | Final Standings | ||
| Finish | Team | Points |
| 1. | No. 17 Arizona State | 1,695 |
| 2. | Arizona | 1,240 |
| 3. | Houston | 1,211.5 |
| 4. | TCU | 854 |
| 5. | Utah | 809.5 |
| 6. | Cincinnati | 800.5 |
| 7. | BYU | 761.5 |
| 8. | Kansas | 542 |
| 9. | West Virginia | 409 |
| 10. | Iowa State | 397 |
Addison Richards, Alexia Jackson Hansen and Halli Williams gave BYU three more all-conference finishes on Saturday.
Richards earned her second All-Big 12 Second Team spot of the meet with a personal-best 2:11.11 to take fifth in the 200 breast. The senior from Orem, Utah’s 2:11.11 is good for No. 2 all-time at BYU. With Miller Lung’s school record in the race, the Cougars saw their two fastest times ever in the 200 breast recorded in the same heat.
Jackson Hansen earned her second All-Big 12 finish of the meet with a fourth-place finish at 239.55 in the platform diving final. The junior hit 270.95 and finished runner-up in the platform prelim to reach the championship final.
“Alexia showed some glimpses of her real potential at this meet,” said BYU head dive coach Tyce Routson. “I’m proud of how she fought on platform and am excited to carry this momentum into NCAA qualifying next week.”
Williams used a personal-best 49.41 in the 100 free to reach the A Final and finished seventh there for All-Big 12 Second Team. The senior from Houston, Texas now has consecutive seasons with All-Big 12 honors and six for her career.
With the 2025 Big 12 Championships complete, the Cougars now move into further postseason action as they look to qualify for NCAA Championships.