| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Beukema, Nathan W (18)
|
PVMACH |
47.86 |
49.98 |
2.12 |
| 2 |
Reinsel, Seth R (17)
|
PVMACH |
52.05 |
52.95 |
0.90 |
| 3 |
LeeSing, Giovanni X (17)
|
PVMACH |
51.08 |
53.97 |
2.89 |
| 4 |
Cantrell, Zachary M (16)
|
PVMACH |
53.63 |
55.35 |
1.72 |
| 5 |
Labovitch, Steven R (17)
|
PVMACH |
56.57 |
57.20 |
0.63 |
| 6 |
Weinstock, Harrison L (15)
|
PVMACH |
56.64 |
57.70 |
1.06 |
| 7 |
Ritchotte, Rowan P (16)
|
PVMACH |
55.39 |
58.22 |
2.83 |
| 8 |
Anguizola, Marco T (15)
|
PVMACH |
54.67 |
58.44 |
3.77 |
| 9 |
Salisbury, William L (18)
|
PVMACH |
58.01 |
59.02 |
1.01 |
| 10 |
Robbins, Alexander H (16)
|
PVMACH |
1:05.90 |
1:01.38 |
-4.52 |
| 11 |
Souter, Emmanuel J (15)
|
PVMACH |
1:04.63 |
1:07.89 |
3.26 |
|
Ona, Rodrigo D (15)
|
PVMACH |
1:08.74 |
NS |
- |