| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Baskett, Walter R (18)
|
GUSSAN |
46.92 |
49.30 |
2.38 |
| 2 |
Shine, Joseph F (17)
|
GUMAC |
49.72 |
49.95 |
0.23 |
| 3 |
Isaacs, Tanner C (16)
|
GUSSAN |
51.47 |
51.33 |
-0.14 |
| 4 |
Cristal, Neil Christian (16)
|
GUMAC |
51.01 |
52.61 |
1.60 |
| 5 |
Garza, Vincent (15)
|
GUSSAN |
51.35 |
52.87 |
1.52 |
| 6 |
Whitaker, Jacob C (15)
|
GUMAC |
54.92 |
52.88 |
-2.04 |
| 7 |
Ward, Eli T (16)
|
GUSSAN |
53.20 |
52.98 |
-0.22 |
| 8 |
Robertson, Jonathon L (16)
|
GUSSAN |
53.23 |
53.00 |
-0.23 |
| 9 |
Garza, Rodrigo (16)
|
GUMAC |
52.38 |
53.05 |
0.67 |
| 10 |
Ward, Owen M (15)
|
GUSSAN |
50.26 |
53.70 |
3.44 |
| 11 |
Kelly, Michael R (16)
|
GUSSAN |
53.26 |
53.99 |
0.73 |
| 12 |
Rodrigues, Pedro L (15)
|
GUSSAN |
|
57.18 |
- |
| 13 |
Fraguela, Sergio (16)
|
GUMAC |
56.71 |
57.36 |
0.65 |
| 14 |
Masella, Nicholas D (15)
|
GUMARC |
|
58.38 |
- |
| 15 |
Rueda, Santiago (15)
|
GUMAC |
57.33 |
58.85 |
1.52 |
| 16 |
Stockert, Daniel J (16)
|
GUMAC |
1:01.21 |
1:00.75 |
-0.46 |
| 17 |
Goulait, Winston S (16)
|
GUMARC |
57.43 |
1:01.60 |
4.17 |
| 18 |
Lashbrook, Tristan R (16)
|
GUMAC |
1:03.44 |
1:03.03 |
-0.41 |
|
Martino, Henrique C (18)
|
GUSSAN |
50.10 |
NS |
- |
|
Kohli, Tanuj V (15)
|
GUMAC |
1:05.64 |
NS |
- |