| Rank | Name | Age | Nat | Result | Date | Competition | Location | |
|---|
| 03% (1) | Kenneth FERGUSON | 21 | USA | 48.69s | | 29 Apr 2005 | IAAF Grand Prix II | Fort-de-France FRA | |
| 06% (2) | Victor OKORIE | 21 | NGR | 49.00s | | 12 Jun 2003 | National Champs | Sacramento, Ca USA | |
| 10% (3) | Greg JOHNSON | 23 | USA | 51.79s | | 23 Apr 2005 | ACC Outdoor Championships | Tallahassee, Fl USA | |
| 13% (4) | Steve MORIN | 23 | CAN | 52.61s | | 15 Jul 2005 | National Champs | Winnipeg CAN | |
| 17% (5) | Dan BRAY | 22 | GBR | 52.75s | | 06 May 2006 | British League Premiership | Barnet Copthall GBR | |
| 20% (6) | John BRUMUND-SMITH | 23 | USA | 52.93s | | 16 May 2003 | North Central Last Chance | Naperville, IL USA | |
| 24% (7) | Julius JILES-TINDALL | 19 | USA | 53.08s | | 15 Apr 2005 | Tom Botts Inv | Columbia, MO USA | |
| 27% (8) | Gavin HODGSON | 22 | GBR | 53.70s | | 28 Jun 2000 | Achilles-Dartmouth-Brown | Oxford GBR | |
| 31% (9) | Devin WILSON | 20 | USA | 54.28s | | 07 Apr 2005 | Texas Relays | university Of USA | |
| 34% (10) | Adam ZAREMBA | 20 | USA | 54.99s | | 24 Apr 2009 | 2009 Gina Relays | Hillsdale, MI USA | |
| 37% (11) | Jay OATTS | 17 | USA | 55.18s | | 19 Jun 2005 | USATF Tennessee Association C. | Nashville USA | |
| 41% (12) | Jonathan MELLINGER | 16 | USA | 56.60s | | 22 May 2006 | East Coast Relays | Morristown USA | |
| 44% (13) | Drew COLEMAN | 15 | USA | 57.10s | | 15 Jul 2006 | AAU Region 9A Track & Field | San Antonio, TX USA | |
| 48% (14) | Mark CARLSON | 16 | USA | 57.16s | | 14 Mar 2008 | UTSA Relays | San Antonio, TX USA | |
| 51% (15) | Michael MUMPHORD | 17 | USA | 57.42s | | 10 Jul 2007 | 2007 AAU Region 9A T & F | San Antonio USA | |
| 55% (16) | Mark AHLEHUUS | 17 | DEN | 58.48s | | 10 Sep 2005 | National Champs | Rønne DEN | |
| 58% (17) | Andrew SIMS | 18 | GBR | 59.60s | | 10 Jun 2001 | WJL | Aberdare GBR | |
| 62% (18) | Mark KRUEGER | 22 | USA | 59.93s | | 18 Apr 1998 | University of Rochester Invite | Rochester, NY USA | |
| 65% (19) | Jeff STANNERS | 25 | USA | 1:00.88 | | 08 Jul 2000 | USATF Southern Cal Assoc. Cha. | Cerritos, CA USA | |
| 68% (20) | Dexter MCCLOUD | 44 | USA | 1:01.00 | | 09 Apr 2005 | Carolina Masters Invitational | Charlotte, Nor USA | |
| 72% (21) | Nick HOOKER | 9 | GBR | 1:01.10 | | 07 Jun 1998 | national junior athletic leagu | Gateshead GBR | |
| 75% (22) | Jason WEBER | 23 | USA | 1:02.31 | | 24 Jun 2006 | New Englands | Boston Ma. USA | |
| 79% (23) | Ryan JOYCE | 18 | USA | 1:05.30 | | 19 Apr 2006 | Duel Meet (Arlington) | East Fishkill, USA | |
| 82% (24) | William PARRY | 29 | GBR | 1:09.10 | | 02 May 2009 | Southern Men s League Div 3S | Kingston upon GBR | |
| 86% (25) | Matthew DE WITT | 18 | USA | 1:09.20 | | 20 Jun 1998 | USATF Wisconsin Junior Olympi. | Madison, WI USA | |
| 89% (26) | Simon MAY | 16 | GBR | 1:12.00 | | 02 Jul 2005 | Mens League | Yate GBR | |
| 93% (27) | Paul HILLYARD | 52 | GBR | 1:16.50 | | 20 May 2006 | SML Div 2 South | Cambridge Univ GBR | |
| 96% (28) | David ASHWORTH | 37 | GBR | 1:19.70 | | 03 Jun 2006 | MIDLAND LGE DIV 3 - B RACE | YATE GBR | |
