2019 USA Swimming Speedo Junior National Championships
- Tuesday, August 6 – Saturday, August 10, 2019
- Stanford Avery Aquatic Center, Palo Alto, CA
- Prelims 9 AM / Finals 5 PM (U.S. Pacific Time)
- LCM format
- Psych sheet
- Live stream (all sessions)
- Start Lists & Live Results
Austin Trinity Aquatic Club’s Jillian Cox, who has been 14 years old all of three weeks, became the ninth-fastest swimmer in girls’ 13-14 history when she won the 400 free at U.S. Junior Nationals on Thursday. Cox came into the meet seeded fifth in the event with 4:16.27, a PB by 3.7 seconds she had swum at Mission Viejo’s SMOC in June. Last summer, her best time in the 400 free was 4:30.63. Since then, she has made steady progression in the distance. She opened the 2019 long-course season with 4:23.27 at College Station Sectionals in February, hit 4:19.95 in April and again at the beginning of June, then notched her 4:16.27 at SMOC at the end of June to earn a berth at 2020 U.S. Olympic Team Trials.
Cox’s improvement has come primarily up front, but she has dropped time on all four 100s:
| June 2019 | August 2019 | |
| 1st 100 | 1:02.58 | 1:01.12 |
| 2nd 100 | 1:05.85 | 1:04.91 |
| 3rd 100 | 1:04.85 | 1:04.48 |
| 4th 100 | 1:02.99 | 1:02.73 |
| 4:16.27 | 4:13.24 |
With another year left to improve her standings in the all-time rankings, Cox is a second outside of the top-5.
Top Ten 13-14 Girls
| Time | Swimmer | LSC | Club | Meet | Date | Location |
| 4:07.15 | Sippy Woodhead | US | UN | 1978 US NAG Records | 1/1/1978 | |
| 4:08.65 | Becca Mann | AZ | CAT | 2012 USA Olympic Team Trials | 6/24/2012 | Omaha |
| 4:09.30 | Katie Ledecky | PV | NCAP | 2012 Missouri Grand Prix | 2/9/2012 | Columbia |
| 4:10.11 | Claire Tuggle | CC | CLOV | 2018 Speedo Junior Nationals | 8/1/2018 | Irvine |
| 4:12.30 | Maddie Homovich | GA | NCAC | 2014 Summer Junior Nationals | 7/29/2014 | Irvine |
| 4:12.41 | Courtney Harnish | MA | YY | 2/12/2014 | Orlando | |
| 4:12.53 | Chelsea Chenault | CA | TERA | 2009 CA/NV Speedo Championship | 7/21/2009 | Clovis |
| 4:12.83 | Michele Richardson | US | UN | 12/31/1982 | ||
| 4:13.24 | Jillian Cox | ST | ATAC | 2019 Speedo Junior Nationals | 8/8/2019 | Stanford |
| 4:13.25 | G Ryan | MI | PAAC | 2010 Junior National Champs | 8/8/2010 | Irvine |
Cox was runner-up in the 800 free on Tuesday night, going 8:44.99 which is also a 2020 Olympic Trials cut.
Wow! Congrats Jillian!
Amazing Sippy Woodhead’s record untouched from 1982
1978!