| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
D'Avi, Jack (15)
|
FGYSF |
54.16 |
57.02 |
2.86 |
| 2 |
Mandava, Yeshwanth (15)
|
FGYSF |
55.94 |
57.39 |
1.45 |
| 3 |
Aran, Grant A (15)
|
FGCSSC |
58.73 |
58.55 |
-0.18 |
| 4 |
McKeon, Andres A (17)
|
FGCSSC |
58.36 |
59.22 |
0.86 |
| 5 |
Bonasera, Jason N (15)
|
FGCSSC |
1:00.58 |
59.34 |
-1.24 |
| 6 |
Melendez, Manuel J (15)
|
FGSOFL |
|
1:02.88 |
- |
| 7 |
Louis-Jeune, Darion J (15)
|
FGCSSC |
1:09.46 |
1:03.66 |
-5.80 |
| 8 |
Barrios, Guillermo (16)
|
FGCSSC |
1:01.98 |
1:04.25 |
2.27 |
| 9 |
Rhyce, Sergey M (17)
|
FGPAQ |
1:10.77 |
1:05.72 |
-5.05 |
| 10 |
Chin, Cody C (16)
|
FGCSSC |
1:03.71 |
1:08.68 |
4.97 |
| 11 |
Wulkan, Bryce A (17)
|
FGPAQ |
1:19.72 |
1:19.21 |
-0.51 |
| 12 |
Mimick, Ethan M (17)
|
FGPAQ |
1:18.16 |
1:24.45 |
6.29 |
| 13 |
Khacherashvili, Volodymyr (15)
|
FGPAQ |
1:32.36 |
1:30.35 |
-2.01 |
|
McCormick, Samuel J (16)
|
FGCSSC |
1:05.04 |
NS |
- |
|
Downey, Caleb E (18)
|
FGPST |
58.15 |
NS |
- |
|
Valdivieso, Mateo A (15)
|
FGPST |
57.18 |
NS |
- |