| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Patti, Alexander J (18)
|
MACBST |
55.10 |
1:01.70 |
6.60 |
| 1 |
Fechtman Jr., David P (16)
|
MASSC |
52.32 |
54.03 |
1.71 |
| 1 |
Spector, Seth B (15)
|
MACBST |
54.99 |
58.33 |
3.34 |
| 2 |
Petty, Holden E (16)
|
MACBR |
1:01.68 |
1:02.25 |
0.57 |
| 2 |
Undercofler, Jack J (16)
|
MASSC |
54.91 |
58.41 |
3.50 |
| 3 |
Cheng, Guanjie (16)
|
MABSC |
1:02.01 |
1:03.11 |
1.10 |
| 3 |
Graver, Stephen M (15)
|
MASSC |
57.01 |
58.63 |
1.62 |
| 4 |
Wallace, Cameron J (17)
|
MACBST |
1:06.56 |
1:06.61 |
0.05 |
| 4 |
Krystkiewicz, Thomas M (16)
|
MACBST |
54.99 |
58.77 |
3.78 |
| 5 |
Cervantes-Rodriguez, Jorge L (18)
|
MACBST |
1:03.74 |
1:09.23 |
5.49 |
| 5 |
Ferker, Noah Z (16)
|
MALMOR |
54.47 |
58.88 |
4.41 |
| 6 |
Symons, Ryan M (15)
|
MACBST |
1:12.12 |
1:09.33 |
-2.79 |
| 6 |
Lichtner, Patrick (15)
|
MALMOR |
56.25 |
59.38 |
3.13 |
| 7 |
Hardis, Ethan M (15)
|
MACBR |
1:21.53 |
1:18.72 |
-2.81 |
| 7 |
Swain, Francis A (16)
|
MACBST |
59.13 |
59.39 |
0.26 |
| 8 |
Hession, David M (17)
|
MACBR |
|
1:20.71 |
- |
| 8 |
Whitaker, Miles T (17)
|
MASSC |
56.73 |
59.86 |
3.13 |
| 9 |
Huegel, Michael M (15)
|
MASSC |
58.84 |
1:00.52 |
1.68 |
| 10 |
Pierce, Jeremy R (16)
|
MASSC |
59.68 |
1:00.62 |
0.94 |
| 11 |
Shmurak, James D (15)
|
MACRSC |
|
1:01.01 |
- |
| 12 |
Johnson, Trevor J (17)
|
MACRSC |
|
1:01.07 |
- |
| 13 |
Durkan, Ryan M (16)
|
MASSC |
1:01.90 |
1:01.28 |
-0.62 |
|
Feldman, Jaden I (16)
|
MALMOR |
59.60 |
NS |
- |