| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Lin, Christopher T (10)
|
FGPCS |
40.29 |
41.55 |
1.26 |
| 2 |
Rais, Gabriel L (10)
|
FGBRST |
43.05 |
43.45 |
0.40 |
| 3 |
Berke, Jared I (9)
|
FGPCS |
47.80 |
43.52 |
-4.28 |
| 4 |
Broad, Lincoln (10)
|
FGMS |
|
43.60 |
- |
| 5 |
Jean, Jordan M (9)
|
FGUNAT |
46.34 |
45.66 |
-0.68 |
| 6 |
Mantilla, Thiago (10)
|
FGMS |
52.69 |
47.20 |
-5.49 |
| 7 |
Santos, Kevin T (10)
|
FGPCS |
48.81 |
47.78 |
-1.03 |
| 8 |
Paden, Joseph I (9)
|
FGPCS |
51.22 |
49.22 |
-2.00 |
| 9 |
Bonini, Pietro (8)
|
FGMS |
|
50.66 |
- |
| 10 |
Corrales, Renato (10)
|
FGSFTL |
56.38 |
51.26 |
-5.12 |
| 11 |
Linares, Lucas (9)
|
FGSFTL |
53.72 |
51.62 |
-2.10 |
| 12 |
Sauvage, Oliver (10)
|
FGSFTL |
53.91 |
51.67 |
-2.24 |
| 13 |
Rosenthal, Frederick B (10)
|
FGPCS |
52.46 |
51.94 |
-0.52 |
| 14 |
Krasnov, Robert J (8)
|
FGPCS |
|
52.92 |
- |
| 15 |
McClaine, Brody T (10)
|
FGPCS |
55.85 |
54.01 |
-1.84 |
| 16 |
Ozaktay, Levent L (9)
|
FGPCS |
58.54 |
54.36 |
-4.18 |
| 17 |
Warner, Christopher C (8)
|
FGPCS |
56.95 |
54.99 |
-1.96 |
| 18 |
Bass, Alistair J (8)
|
FGSFTL |
56.36 |
57.00 |
0.64 |
| 19 |
Carey, Connor I (10)
|
FGSFTL |
55.06 |
58.31 |
3.25 |
| 20 |
Cisternas-Acho, Maximiliano (10)
|
FGBRST |
|
58.55 |
- |
| 21 |
Olive, Emerson L (7)
|
FGPCS |
|
1:03.05 |
- |
| 22 |
Antonio, Christian F (8)
|
FGPCS |
|
1:03.76 |
- |
| 23 |
Corrales, Francesco (8)
|
FGSFTL |
1:06.33 |
1:05.58 |
-0.75 |
|
Sachenko, Danil (10)
|
FGPCS |
50.34 |
DQ |
- |
|
De Arcas, Pelayo (9)
|
FGMS |
|
DQ |
- |
|
Dantas, Dylan (9)
|
FGBRST |
|
DQ |
- |