Bib | Athlete | Year | Cat. | | PB |
| NOZAWA Keisuke | 1991 | M | JPN JAPAN | 49.51 |
| COCHRANE Michael | 1991 | M | NZL NEW ZEALAND | 49.58 |
| ANDERSSON Isak | 1996 | M | SWE SWEDEN | 50.45 |
| THOMPSON Lennox | 1993 | M | GBR GREAT BRITAIN & N.I. | 52.04 |
| CESATI Federico | 1998 | M | ITA ITALY | 52.06 |
| | | | MI089 PRO SESTO ATL. | |
| ROBBIN Jean Marie | 1998 | M | ITA ITALY | 52.32 |
| | | | AO004 ATLETICA SANDRO CALVESI | |
| MARVYN Deslandes | 1999 | M | FRA FRANCE | 52.77 |
| REBAGLIATI Francesco | 1996 | M | ITA ITALY | 53.80 |
| | | | SV070 ATLETICA ARCOBALENO SAVONA | |
| DIALLO Allassane | 1999 | M | CIV IVORY COAST | 54.44 |
| | | | CN020 A.S.D. ATLETICA ROATA CHIUSANI | |
| CARENA Stefano | 1995 | M | ITA ITALY | 54.70 |
| | | | TO226 S.A.F.ATLETICA PIEMONTE A.S.D. | |
| LICATA Samuele | 1999 | M | ITA ITALY | 54.80 |
| | | | SR128 A.S. DIL. MILONE | |
| OLIVIERI Estifanos | 2003 | M | ITA ITALY | 58.16 |
| | | | GE002 A.S.D. C.U.S. GENOVA | |
|