400 meter Sen Men, Heat:5 of 5 ; Official result since 15:26
| Rank | Lane | ID | Name | SB | Team | Cat | Result | Info | Video |
| 1 | 6 | 101 | KELLY Kieran | Raheny Shamrock A.C. | Sen | 50.05 | q | ||
| 2 | 5 | 204 | ARREY Brandon | Blarney/Inniscara A.C. | Sen | 50.85 | |||
| 3 | 4 | 47 | BRESLIN Paul | Crusaders A.C. | Sen | 51.96 | |||
| 4 | 3 | 153 | CAMPBELL David | Donore Harriers | Sen | 52.63 |