| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Sirkowa, Robert A (17)
|
MREAST |
48.50 |
49.78 |
1.28 |
| 2 |
Rose, Alexander T (18)
|
MREAST |
48.51 |
49.87 |
1.36 |
| 3 |
Attwell, Nathaniel S (16)
|
MREAST |
51.84 |
52.47 |
0.63 |
| 4 |
Kim, Junhyoung (15)
|
MREAST |
51.76 |
53.53 |
1.77 |
| 5 |
Rutishauser, Weston M (14)
|
MREAST |
53.53 |
54.51 |
0.98 |
| 6 |
Curylo, Thaddeus J (14)
|
MREAST |
57.31 |
55.06 |
-2.25 |
| 7 |
Barron, Michael L (15)
|
MREAST |
57.92 |
56.75 |
-1.17 |
| 8 |
Park, Peter J (14)
|
MREAST |
58.10 |
57.08 |
-1.02 |
| 9 |
Isak, Ethan C (13)
|
MREAST |
59.69 |
57.97 |
-1.72 |
| 10 |
Ntrivalas, Ian E (14)
|
MREAST |
58.84 |
58.36 |
-0.48 |
| 11 |
Langerfeld, Robert T (14)
|
MREAST |
58.78 |
59.91 |
1.13 |
| 12 |
Boyer, Jackson X (13)
|
MREAST |
58.85 |
1:00.03 |
1.18 |
| 13 |
Karamehmedovic, Jake D (13)
|
MREAST |
57.32 |
1:00.11 |
2.79 |
| 14 |
Mora-Castillo, Sebastian (14)
|
MREAST |
1:02.83 |
1:01.98 |
-0.85 |
| 15 |
Variano, Matthew B (13)
|
MREAST |
1:03.66 |
1:06.14 |
2.48 |
| 16 |
Driver, Steven J (14)
|
MREAST |
1:08.86 |
1:06.91 |
-1.95 |