| Rank | Name | Age | Nat | Result | Date | Competition | Location | |
|---|
| 03% (1) | Terrance HARVEY | 34 | USA | 0.01s | | 01 Apr 2019 | World Champs | Wyoming, Michi USA |  |
| 06% (2) | Kenneth FERGUSON | 21 | USA | 48.69s | | 29 Apr 2005 | IAAF Grand Prix II | Fort-de-France FRA | |
| 09% (3) | Victor OKORIE | 21 | NGR | 49.00s | | 12 Jun 2003 | National Champs | Sacramento, Ca USA | |
| 12% (4) | Greg JOHNSON | 23 | USA | 51.79s | | 23 Apr 2005 | ACC Outdoor Championships | Tallahassee, Fl USA | |
| 15% (5) | Steve MORIN | 23 | CAN | 52.61s | | 15 Jul 2005 | National Champs | Winnipeg CAN | |
| 18% (6) | Dan BRAY | 22 | GBR | 52.75s | | 06 May 2006 | British League Premiership | Barnet Copthall GBR | |
| 21% (7) | John BRUMUND-SMITH | 23 | USA | 52.93s | | 16 May 2003 | North Central Last Chance | Naperville, IL USA | |
| 24% (8) | Julius JILES-TINDALL | 19 | USA | 53.08s | | 15 Apr 2005 | Tom Botts Inv | Columbia, MO USA | |
| 27% (9) | Gavin HODGSON | 22 | GBR | 53.70s | | 28 Jun 2000 | Achilles-Dartmouth-Brown | Oxford GBR | |
| 30% (10) | Devin WILSON | 20 | USA | 54.28s | | 07 Apr 2005 | Texas Relays | university Of USA | |
| 33% (11) | Adam ZAREMBA | 20 | USA | 54.99s | | 24 Apr 2009 | 2009 Gina Relays | Hillsdale, MI USA | |
| 36% (12) | Jay OATTS | 17 | USA | 55.18s | | 19 Jun 2005 | USATF Tennessee Association C. | Nashville USA | |
| 39% (13) | Jonathan MELLINGER | 16 | USA | 56.60s | | 22 May 2006 | East Coast Relays | Morristown USA | |
| 42% (14) | Drew COLEMAN | 15 | USA | 57.10s | | 15 Jul 2006 | AAU Region 9A Track & Field | San Antonio, TX USA | |
| 45% (15) | Mark CARLSON | 16 | USA | 57.16s | | 14 Mar 2008 | UTSA Relays | San Antonio, TX USA | |
| 48% (16) | Michael MUMPHORD | 17 | USA | 57.42s | | 10 Jul 2007 | 2007 AAU Region 9A T & F | San Antonio USA | |
| 51% (17) | Mark AHLEHUUS | 17 | DEN | 58.48s | | 10 Sep 2005 | National Champs | R?nne DEN | |
| 54% (18) | Benjamin BROWN | 18 | AUS | 58.95s | | 02 Mar 2012 | UQ permit meet | St Lucia, Bris AUS | |
| 57% (19) | Andrew SIMS | 18 | GBR | 59.60s | | 10 Jun 2001 | WJL | Aberdare GBR | |
| 60% (20) | Calvin HOUSEHOLDER | 15 | USA | 59.84s | | 04 Jul 2015 | AAU Track & Field Region 19 | Converse Judson USA | |
| 63% (21) | Mark KRUEGER | 22 | USA | 59.93s | | 18 Apr 1998 | University of Rochester Invite | Rochester, NY USA | |
| 66% (22) | Jeff STANNERS | 25 | USA | 1:00.88 | | 08 Jul 2000 | USATF Southern Cal Assoc. Cha. | Cerritos, CA USA | |
| 69% (23) | Dexter MCCLOUD | 44 | USA | 1:01.00 | | 09 Apr 2005 | Carolina Masters Invitational | Charlotte, Nor USA | |
| 72% (24) | Nick HOOKER | 9 | GBR | 1:01.10 | | 07 Jun 1998 | national junior athletic leagu | Gateshead GBR | |
| 75% (25) | Jason WEBER | 23 | USA | 1:02.31 | | 24 Jun 2006 | New Englands | Boston Ma. USA | |
| 78% (26) | Nathan MUSOKE | 17 | CAN | 1:03.25 | | 14 Jun 2009 | Junior-Senior Selection | Beazley Field CAN | |
| 81% (27) | Ryan JOYCE | 18 | USA | 1:05.30 | | 19 Apr 2006 | Duel Meet (Arlington) | East Fishkill, USA | |
| 84% (28) | William PARRY | 29 | GBR | 1:09.10 | | 02 May 2009 | Southern Men s League Div 3S | Kingston upon GBR | |
| 87% (29) | Matthew DE WITT | 18 | USA | 1:09.20 | | 20 Jun 1998 | USATF Wisconsin Junior Olympi. | Madison, WI USA | |
| 90% (30) | Simon MAY | 16 | GBR | 1:12.00 | | 02 Jul 2005 | Mens League | Yate GBR | |
| 93% (31) | Paul HILLYARD | 52 | GBR | 1:16.50 | | 20 May 2006 | SML Div 2 South | Cambridge Univ GBR | |
| 96% (32) | David ASHWORTH | 37 | GBR | 1:19.70 | | 03 Jun 2006 | MIDLAND LGE DIV 3 - B RACE | YATE GBR | |
