| Event | Heat | Status | |
|---|---|---|---|
| Men 400 M Hurdles Open (Prelims) | 4|4 | ||
| Friday 6:35 PM |
| Record | Athlete | Date | ||
|---|---|---|---|---|
| MR | Meet | Rai Benjamin - Nike | 46.83 | 6/26/2021 |
| FR | Hayward | Rai Benjamin - USA | 46.83 | 6/26/2021 |
| AR | American | Rai Benjamin - Nike | 46.17 | 8/3/2021 |
| WR | World | Karsten Warholm - NOR | 45.94 | 8/3/2021 |
| WQ | World Qualifier | 48.90 |
| Pl | Ln | Athlete | Time | ||
|---|---|---|---|---|---|
| 1 | 7 | David KENDZIERA Unattached |
50.75 Q | 0.224 | |
| 2 | 8 | Aldrich BAILEY Unattached |
51.21 Q | 0.254 | |
| 3 | 4 | Christopher ROBINSON South Plains |
51.78 Q PB | 0.213 | |
| 4 | 6 | Cass ELLIOTT Washington |
51.83 | 0.236 | |
| 5 | 9 | Austin LIETZ Unattached |
53.19 | 0.222 | |
| DNF | 5 | Jayson BALDRIDGE Baylor |
- | 0.174 |