| # | FLYRA | 47.76 | Tyrese Cooper | Miami Gardens ETC | 5/11/2019 |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 2 | EDWARDS JR., Justin | Fearless | 55.46 | Verified |
| 3 | ELWIN, Justin | Unattached | 55.29 | Unverified: Coach Miami Presents The Show Do |
| 4 | STUBBS, amari | TVC | 55.00 | Unverified: No Q time found |
| 5 | RUGGIERO, Johnny | Gulf Coast Runners Youth Team | 55.23 | Unverified: Collier County MS Championships |
| 6 | ORANGE, James | South Dade Express Track Club | 55.37 | Verified |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | HARRIS, Aaron | Red Sea Running Club | 54.92 | Verified |
| 2 | WINFIELD, Michael | FAU High School | 54.65 | Verified |
| 3 | CARTER, Jonathan | West Pembroke Pines Optimist Tra | 54.50 | Verified |
| 4 | ANDERSON, Philip | Silverlake Middle Sc | 54.40 | |
| 5 | WATKINS, Winston | Unattached | 54.41 | Unverified: Private 8 Track Meet |
| 6 | DORSEY, Nias | Florida High School | 54.56 | Verified |
| 7 | MAYO JR, Quinton | Im Fit Xpress Club | 54.87 | Verified |
| 8 | MORRISSEY, Maltius | TVC | 55.00 | Unverified: No Q time found |
| Lane | Athlete | Team | Seed | Note |
|---|---|---|---|---|
| 1 | JAMES, Jerald | South Dade Express Track Club | 54.20 | Verified |
| 2 | HALE, Caulder | Gulf Coast Runners Youth Team | 53.36 | Unverified: Gulfview Middle School Quad Meet |
| 3 | RIO, Santonio | Oakleaf Junior High School | 52.22 | Verified |
| 4 | GILLIS, Jermichael | Power House Athletics | 51.92 | Verified |
| 5 | SAPP, Cameron | South Dade Express Track Club | 52.18 | Verified |
| 6 | MIGUEL, Jesiyah | Rare Breed Track Club | 52.72 | Verified |
| 7 | SOCARRAS, Joseph | South Dade Express Track Club | 53.99 | Unverified: belen middle school meet 3/13/20 |
| 8 | EASLEY, Jaleel | Bradford Middle School | 54.33 | Verified |