| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Majka, Noah J (12)
|
MDHSST |
1:20.62 |
1:20.22 |
-0.40 |
| 2 |
Wetzel, Matthew D (12)
|
MDFSC |
1:23.55 |
1:21.55 |
-2.00 |
| 3 |
Northey, James O (12)
|
MDMAS |
1:24.63 |
1:22.86 |
-1.77 |
| 4 |
Villanueva, Marcos G (12)
|
MDMSC |
1:25.96 |
1:24.13 |
-1.83 |
| 5 |
MacLaren, Jack D (12)
|
MDMAS |
1:22.41 |
1:24.32 |
1.91 |
| 6 |
Stein, Jonah C (12)
|
MDRAC |
1:25.39 |
1:24.70 |
-0.69 |
| 7 |
MacAdam, Noah J (11)
|
MDNBAC |
1:22.56 |
1:25.18 |
2.62 |
| 8 |
Cason, Ibraheem B (11)
|
MDBCSC |
1:26.94 |
1:25.44 |
-1.50 |
| 9 |
Vandewinckel, Lucas C (12)
|
MDGBSA |
1:27.40 |
1:25.99 |
-1.41 |
| 10 |
Porter, Michael L (11)
|
MDLBA |
1:22.65 |
1:26.25 |
3.60 |
| 11 |
Williams, Daniel F (11)
|
MDMAS |
1:27.27 |
1:26.51 |
-0.76 |
| 12 |
Atalla, Gabriel C (12)
|
MDRAC |
1:27.24 |
1:27.89 |
0.65 |
| 13 |
Zieger, Aidan F (12)
|
MDCGA |
1:24.53 |
1:28.14 |
3.61 |