| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Brennan, Brian P (18)
|
MASSC |
44.45 |
47.83 |
3.38 |
| 2 |
Whitsett, Cole M (17)
|
MASSC |
45.53 |
49.16 |
3.63 |
| 3 |
Foley, Michael J (16)
|
MAJW |
48.25 |
50.30 |
2.05 |
| 4 |
Boeckx, Alexander A (17)
|
MASSC |
46.85 |
50.50 |
3.65 |
| 5 |
Graver, Stephen M (15)
|
MASSC |
50.67 |
51.54 |
0.87 |
| 6 |
Ray, Prathit (15)
|
MASSC |
51.02 |
52.10 |
1.08 |
| 7 |
Undercofler, Jack J (16)
|
MASSC |
50.23 |
52.91 |
2.68 |
| 8 |
Morris, Austin R (18)
|
MAUNJW |
51.61 |
53.29 |
1.68 |
| 9 |
Boerger, Thomas R (18)
|
MASSC |
48.78 |
54.61 |
5.83 |
| 10 |
Derivaux, Christopher C (16)
|
MAJW |
52.17 |
55.00 |
2.83 |
| 11 |
Whartenby, Miller M (15)
|
MAJW |
54.69 |
57.55 |
2.86 |
| 12 |
Nasielski, Michael L (16)
|
MAJW |
57.37 |
1:00.15 |
2.78 |
|
Orr, Harrison F (16)
|
MAJW |
56.34 |
58.30 |
1.96 |