400m U23 Men ; Official result since 17:34
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 5 | 145 | ARREY Brandon | Blarney/Inniscara A.C. | 48.75 | ||||
| 2 | 6 | 256 | IRWIN Zak | Sligo A.C. | 48.77 | ||||
| 3 | 4 | 55 | NEWELL Craig | Ballymena & Antrim A.C. | 49.47 | ||||
| 4 | 3 | 232 | WHITE Paul | Nenagh Olympic A.C. | 49.85 | ||||
| 5 | 1 | 297 | BUGGY Eoghan | St Abbans A.C | 50.72 | ||||
| 2 | 315 | MEAGHER Robert | Galway City Harriers A.C. | DNF |