| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Giunta, Noah L (17)
|
MRTVSC |
47.34 |
49.59 |
2.25 |
| 2 |
Veit, Colin S (15)
|
MRTVSC |
50.14 |
50.32 |
0.18 |
| 3 |
Brady, Timothy M (16)
|
MRTVSC |
50.50 |
50.93 |
0.43 |
| 4 |
Griffin, Oliver R (17)
|
MRTVSC |
51.82 |
52.88 |
1.06 |
| 5 |
Boudreau, Sergei J (15)
|
MRTVSC |
52.90 |
53.20 |
0.30 |
| 6 |
Paton, Gavin C (15)
|
MRIA |
51.59 |
53.57 |
1.98 |
| 7 |
Prokopiou, Markos (16)
|
MRIA |
52.72 |
54.31 |
1.59 |
| 8 |
Lipp, Mark G (17)
|
MRSSC |
55.46 |
54.94 |
-0.52 |
| 9 |
Specht, Sam T (16)
|
MRIA |
53.55 |
55.19 |
1.64 |
| 10 |
Casalinuovo, Johnny A (15)
|
MRTVSC |
54.58 |
55.75 |
1.17 |
| 11 |
Sloniewsky, Peter A (18)
|
MRTVSC |
53.08 |
56.07 |
2.99 |
| 12 |
Conlon, William D (16)
|
MRHYB |
55.48 |
56.30 |
0.82 |
| 13 |
Miele, Matthew J (15)
|
MRTVSC |
55.26 |
58.76 |
3.50 |
| 14 |
Jin, Nolan E (15)
|
MRTVSC |
|
59.93 |
- |
| 15 |
Oreilly, Kieran T (16)
|
MRIA |
58.22 |
1:00.73 |
2.51 |
| 16 |
Viollis, Logan (15)
|
MRSSC |
1:01.21 |
1:01.38 |
0.17 |
| 17 |
Dabakarov, Evan D (17)
|
MRHYB |
1:03.12 |
1:02.47 |
-0.65 |
| 18 |
Holmes, James P (17)
|
MRCSDC |
1:06.20 |
1:06.54 |
0.34 |
| 19 |
Keesler-Whitehouse, Evan J (15)
|
MRSSC |
1:17.08 |
1:13.94 |
-3.14 |
| 20 |
DeGregorio, Francis (15)
|
MRHYB |
1:30.03 |
1:17.10 |
-12.93 |
|
Buchen, Max H (17)
|
MRTVSC |
52.44 |
NS |
- |
|
Klaric, Zander W (17)
|
MRTVSC |
52.96 |
NS |
- |