| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Hughes, James A (16)
|
MASSC |
51.29 |
50.99 |
-0.30 |
| 2 |
Hughes, Jack R (16)
|
MASSC |
53.37 |
52.55 |
-0.82 |
| 3 |
Maziarz, Dylan (16)
|
MAPCAC |
50.83 |
53.04 |
2.21 |
| 4 |
Thomas, Jack F (18)
|
MABSC |
59.71 |
55.14 |
-4.57 |
| 5 |
Baldino, Tyler J (15)
|
MASSC |
55.96 |
55.91 |
-0.05 |
| 6 |
Belkadi, Ameen H (16)
|
MAWA |
55.87 |
56.27 |
0.40 |
| 7 |
Kilroy, Ethan (15)
|
MAACAC |
1:02.74 |
1:00.87 |
-1.87 |
| 8 |
Fredericksdorf, Robert C (15)
|
MANSC |
1:00.86 |
1:01.69 |
0.83 |
| 9 |
Lewis, Mason (16)
|
MAWWC |
58.40 |
1:02.13 |
3.73 |
| 10 |
Dileo, Graham (16)
|
MAACAC |
1:01.72 |
1:02.66 |
0.94 |
|
Dencker, Jean-Paul Q (17)
|
MAPCAC |
|
51.81 |
- |
|
Gallagher, Billy A (18)
|
MAPCAC |
51.01 |
NS |
- |
|
Williams, Erik D (16)
|
MAPCAC |
49.41 |
NS |
- |
|
Luckangelo, Jake O (17)
|
MAUN |
1:02.74 |
NS |
- |
|
Buitron, Christopher C (16)
|
MAWA |
48.74 |
NS |
- |
|
Francis, Samuel L (16)
|
MAWWC |
57.10 |
NS |
- |