| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Ramnath, Viaan (9)
|
MRYFD |
44.73 |
43.78 |
-0.95 |
| 2 |
Loucopoulos, Christian A (9)
|
MRYFD |
46.58 |
46.99 |
0.41 |
| 3 |
Bowens, Thomas J (9)
|
MRBAD |
50.12 |
47.52 |
-2.60 |
| 4 |
Cattie-Watt, Alexander B (9)
|
MRYFD |
54.23 |
50.35 |
-3.88 |
| 5 |
Vasilyev, Lucas (8)
|
MRYFD |
55.26 |
57.70 |
2.44 |
| 6 |
Cosic, Luca (9)
|
NJSCY |
1:04.43 |
1:02.48 |
-1.95 |
| 7 |
Miles, Koh T (9)
|
MRCOND |
|
1:02.67 |
- |
| 8 |
Friedland, Noah T (8)
|
MRYFD |
|
1:03.58 |
- |
| 9 |
Pellumbi, Michael D (8)
|
MRCOND |
1:01.14 |
1:04.63 |
3.49 |
| 10 |
Walsh, Ryan T (9)
|
MRCOND |
1:11.38 |
1:07.57 |
-3.81 |
| 11 |
Hoffmann, Maximilian H (7)
|
MRBAD |
57.57 |
1:13.39 |
15.82 |
| 12 |
Nguyen, Rhys A (8)
|
MRYFD |
|
1:18.06 |
- |
| 13 |
Wallace, Aiden R (9)
|
MRCOND |
|
1:25.26 |
- |
| 14 |
Yip, Edward (8)
|
MRCOND |
1:24.08 |
1:26.74 |
2.66 |
|
Kim, Lincoln S (9)
|
MRYFD |
|
DQ |
- |
|
Mezey, Leon P (9)
|
MRYFD |
|
DQ |
- |
|
Karellas, Matthew M (8)
|
MRYFD |
|
DQ |
- |
|
Huang, Oliver Y (9)
|
MRYFD |
48.08 |
DQ |
- |
|
Cragg, Warren (8)
|
MRYFD |
|
DQ |
- |
|
Nieto, Max W (9)
|
MRYFD |
1:16.05 |
NS |
- |