| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Bishai, David (8)
|
FGLLL |
49.90 |
42.15 |
-7.75 |
| 2 |
Leyva Riestra, Rainier (7)
|
FGBMHG |
42.11 |
44.68 |
2.57 |
| 3 |
Casal, Morgan (8)
|
FGBMHG |
|
44.75 |
- |
| 4 |
Lee, Steven (8)
|
FGWOW |
|
48.65 |
- |
| 5 |
Scholl, Hayden J (8)
|
FGJDST |
50.66 |
49.15 |
-1.51 |
| 6 |
Rottcher, Benjamin (8)
|
FGWOW |
54.02 |
51.95 |
-2.07 |
| 7 |
Carmona, Juan Sebastian (8)
|
FGBMHG |
52.69 |
56.75 |
4.06 |
| 8 |
Montes, Jose A (8)
|
FGBMHG |
57.12 |
1:03.54 |
6.42 |
|
Calderon, Daniel A (8)
|
FGBMHG |
|
DQ |
- |
|
Kanjian, Braden A (8)
|
FGLLL |
1:14.91 |
DQ |
- |
|
Espina, Diego A (8)
|
FGBMHG |
47.37 |
NS |
- |
|
May, Jack C (8)
|
FGJDST |
|
NS |
- |