| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Wu, Alexander (12)
|
NIGRAY |
41.85 |
41.68 |
-0.17 |
| 2 |
Otero-Vazquez, Santiago (12)
|
NIGRAY |
42.67 |
41.84 |
-0.83 |
| 3 |
Wang, Ziao Wang O (11)
|
NIGRAY |
44.54 |
44.84 |
0.30 |
| 4 |
Harrington, William J (11)
|
NIGRAY |
43.99 |
45.62 |
1.63 |
| 5 |
Cunningham, Rhys (11)
|
NIGRAY |
46.08 |
47.06 |
0.98 |
| 6 |
Singer, Jaden (12)
|
NIGRAY |
53.87 |
49.83 |
-4.04 |
| 7 |
Useda, Andres W (12)
|
NIGRAY |
53.42 |
52.22 |
-1.20 |
| 8 |
Markman, Leopold (12)
|
NIGRAY |
1:07.18 |
1:01.37 |
-5.81 |
| 9 |
Kocan, Joshua (12)
|
ZZHRNY |
1:05.20 |
1:05.06 |
-0.14 |
|
Angona, Joshua M (11)
|
NIGRAY |
|
DQ |
- |
|
Williams, Oliver S (11)
|
NIGRAY |
|
DQ |
- |
|
Eggler, Theodore E (12)
|
NIGRAY |
45.23 |
NS |
- |