| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Anderson, Grafton E (8)
|
MIBBD |
47.74 |
44.80 |
-2.94 |
| 2 |
Remington, Jackson P (8)
|
MIFFYS |
46.59 |
46.10 |
-0.49 |
| 3 |
MacMartin, Brady G (8)
|
MIBBD |
52.57 |
46.24 |
-6.33 |
| 4 |
Leith, Beckham T (7)
|
MIBBD |
48.00 |
48.64 |
0.64 |
| 5 |
Helmick, Carter T (7)
|
MIBBD |
53.35 |
50.82 |
-2.53 |
| 6 |
Veeser, Nolan J (7)
|
MIGTBY |
52.29 |
50.88 |
-1.41 |
| 7 |
Deighan, Stanley R (8)
|
MIBBD |
49.30 |
51.73 |
2.43 |
| 8 |
Kumar, Shiv J (8)
|
MIBBD |
54.67 |
51.78 |
-2.89 |
| 9 |
Folks, Ty C (8)
|
MIFLY |
49.56 |
56.37 |
6.81 |
| 10 |
Deighan, Clem P (8)
|
MIBBD |
1:00.85 |
58.50 |
-2.35 |
| 11 |
Blanchard, Henry R (8)
|
MIFFYS |
1:00.78 |
58.56 |
-2.22 |
| 12 |
Santo, Colvin R (7)
|
MIFFYS |
1:02.84 |
58.66 |
-4.18 |
| 13 |
Danczak, JB (6)
|
6SEA |
|
1:06.28 |
- |
| 14 |
Palmer, Jack B (5)
|
MIBBD |
1:14.88 |
1:07.85 |
-7.03 |
| 15 |
Achterhoff IV, John R (6)
|
MIMYST |
|
1:08.10 |
- |
|
de Aguiar Valim, Marcos R (6)
|
MIMYST |
|
NS |
- |