| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Ekanayake, Hashan (10)
|
FGSF |
43.58 |
42.16 |
-1.42 |
| 2 |
Ekanayake, Marvan (10)
|
FGSF |
42.74 |
42.28 |
-0.46 |
| 3 |
Hincapie, Luca (10)
|
FGSOFL |
|
43.66 |
- |
| 4 |
Smith, Owen D (10)
|
FGSOFL |
49.38 |
45.62 |
-3.76 |
| 5 |
Landron, Gabriel (10)
|
FGSUN |
51.32 |
46.21 |
-5.11 |
| 6 |
Kauefate, Jorge (10)
|
FGSDST |
55.24 |
46.95 |
-8.29 |
| 7 |
Nimroozi, Nick (10)
|
FGSFTL |
52.60 |
50.15 |
-2.45 |
| 8 |
Hussey, Lucas (10)
|
FGCCPR |
|
54.72 |
- |
| 9 |
Tejada, Oliver A (10)
|
FGSDST |
|
55.80 |
- |
| 10 |
Noble-Mattis, Justin A (10)
|
FGPST |
|
59.05 |
- |
| 11 |
Herek, Lorenzo C (10)
|
FGPST |
|
1:00.77 |
- |
| 12 |
Barnhart, Miles C (10)
|
FGCSSC |
|
1:01.77 |
- |
| 13 |
Scavron, Benjamin (10)
|
FGCCPR |
|
1:02.20 |
- |
| 14 |
Taus-Nita, Alexander (10)
|
FGCSSC |
|
1:02.65 |
- |
| 15 |
Stewart, Landon M (10)
|
FGPST |
|
1:06.37 |
- |
| 16 |
Ciuffardi, Giovanni A (10)
|
FGPST |
|
1:10.17 |
- |
| 17 |
Rattray, Kenneth P (10)
|
FGCSSC |
|
1:10.50 |
- |
|
Agudelo, Camilo (10)
|
FGSFTL |
|
NS |
- |