| Lane | Athlete | Team | Seed |
|---|---|---|---|
| 1 | BROWN, Mikel | Refugio | 54.78 |
| 2 | ARVIZU RANGEL, DIEGO | Three Rivers | 54.25 |
| 3 | JASO, Ryan | Refugio | 53.25 |
| 4 | MOORE, Jason | Refugio | 50.81 |
| 5 | OCHOA, Joseph | Kaufer | 55.01 |
| 6 | ROBLEDO, Noah | Freer | 58.59 |
| 7 | VEGA, Manny | Premont | 58.68 |
| 8 | RAMIREZ, Juan | Aqua Dulce | 1:00.38 |