| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Barrett, Noah D (8)
|
MRWEST |
41.90 |
40.61 |
-1.29 |
| 2 |
Lee, Kieran T (7)
|
MRWEST |
42.59 |
41.67 |
-0.92 |
| 3 |
Pearsall, Milo J (8)
|
MRPATS |
44.15 |
41.94 |
-2.21 |
| 4 |
D'Amelio, Cosmo A (8)
|
MRHS |
46.97 |
44.91 |
-2.06 |
| 5 |
Locitzer, Thomas B (8)
|
MRPATS |
49.16 |
45.97 |
-3.19 |
| 6 |
Farole, Nicholas (8)
|
MRCENT |
1:02.89 |
47.84 |
-15.05 |
| 7 |
Elkhoury, Marc (8)
|
MRHS |
1:01.94 |
49.57 |
-12.37 |
| 8 |
Romano, Michael L (8)
|
MRHS |
48.13 |
49.68 |
1.55 |
| 9 |
Kan, Winston C (8)
|
MRHS |
50.63 |
54.62 |
3.99 |
| 10 |
Winthal, Dylan Z (7)
|
MRPATS |
|
55.51 |
- |
| 11 |
Jenkinson, Dylan J (7)
|
MRHS |
52.00 |
55.63 |
3.63 |
| 12 |
Lipyanskiy, Zachary (8)
|
MRCENT |
1:00.00 |
1:05.45 |
5.45 |
|
Del Rosario, Edmund Jacob C (8)
|
MRPATS |
|
DQ |
- |