| 1. | | Jonathan Borlee | 44.78a | Fr | FL | Florida State | NCAA Division I Championships | Sat, Jun 13 |
| 2. | | Gil Roberts | 44.86a | So | TX | Texas Tech | Big 12 Outdoor Championships | Sun, May 17 |
| 3. | | Calvin Smith | 44.96a | Jr | FL | Florida | SEC Outdoor Championships | Sun, May 17 |
| 4. | | Dwight Mullings | 44.98a | Jr | MS | Mississippi State | SEC Outdoor Championships | Sun, May 17 |
| 5. | | Michael Bingham | 45.05a | Sr | NC | Wake Forest | NCAA Division I East Regional | Sat, May 30 |
| 6. | | Christian Taylor | 45.34a | Fr | FL | Florida | Pepsi Florida Relays | Sat, Apr 4 |
| | Justin Oliver | 45.34a | Sr | TX | Texas A&M | NCAA Midwest Regional | Sat, May 30 |
| 8. | | Kevin Borlee | 45.43a | Fr | FL | Florida State | NCAA Division I Championships | Sat, Jun 13 |
| 9. | | Allodin Fothergill | 45.44a | Jr | MD | Maryland-Eastern Shore | NCAA Division I Championships | Sat, Jun 13 |
| 10. | | John Bailey | 45.55a | Sr | MS | Mississippi State | SEC Outdoor Championships | Sun, May 17 |
| 11. | | Bryan Miller | 45.57a | So | TX | Texas A&M | NCAA Midwest Regional | Sat, May 30 |
| 12. | | Jordan Boase | 45.64a | Sr | WA | Washington | Pac-10 Championships | Sun, May 17 |
| 13. | | Armanti Hayes | 45.67a | Jr | LA | LSU | SEC Outdoor Championships | Sun, May 17 |
| 14. | | Jarrin Solomon | 45.68a | Sr | NM | New Mexico | MWC Outdoor Championships | Sat, May 16 |
| 15. | | Darius Law | 45.77a | So | NC | North Carolina-Charlotte | NCAA Division I East Regional | Sat, May 30 |
| 16. | | Thomas Murdaugh | 45.78a | Fr | OH | Ohio State | NCAA Mideast Regional | Sat, May 30 |
| | Jeremy Orr | 45.78a | Sr | MI | Michigan State | NCAA Mideast Regional | Sat, May 30 |
| 18. | | Antione Drakeford | 45.83a | Jr | OH | Cincinnati | Oliver Nikoloff Invitational | Sat, Mar 28 |
| 19. | | Marcus Boyd | 45.84a | So | TX | Baylor | Michael Johnson Classic | Sat, Apr 18 |
| | Robert Simmons | 45.84a | Fr | LA | LSU | NCAA Division I Championships | Sat, Jun 13 |
| 21. | | LeJerald Betters | 45.88a | Jr | TX | Baylor | Michael Johnson Classic | Sat, Apr 18 |
| 22. | | Darryl Hayes | 45.93a | So | TX | Sam Houston State | SLC Outdoor Championships | Sun, May 10 |
| | Joey Hughes | 45.93a | Fr | CA | USC | Pac-10 Championships | Sun, May 17 |
| 24. | | Charles Clark | 45.96a | Jr | FL | Florida State | Seminole Twilight | Sat, May 9 |
| 25. | | Anderson Mutegi | 45.97a | So | TX | Texas-El Paso | Don Kirby Memorial Invitational | Sat, May 2 |
| 26. | | Manteo Mitchell | 46.00a | Jr | NC | Western Carolina | Georgia Tech Invitational | Sat, May 16 |
| 27. | | Brandon O'Connor | 46.04a | Fr | FL | Florida State | Seminole Twilight | Sat, May 9 |
| | Michael Courtney | 46.04a | Sr | TX | Sam Houston State | SLC Outdoor Championships | Sun, May 10 |
| 29. | | Jeshua Anderson | 46.08a | So | WA | Washington State | UW - WSU Dual | Sat, May 2 |
| | Terrance Reid | 46.08a | Sr | IA | Northern Iowa | NCAA Division I Championships | Sat, Jun 13 |
| 31. | | Allodi Fothergill | 46.10a | Fr | MD | Maryland-Eastern Shore | MEAC Outdoor Championships | Sat, May 2 |
| 32. | | Michael Green | 46.13a | So | LA | Northwestern State | SLC Outdoor Championships | Sun, May 10 |
| 33. | | Elvis Lewis | 46.14a | Sr | PA | Villanova | Big East Championships | Sun, May 3 |
| | Lukas Hulett | 46.14a | Jr | NE | Nebraska | Nebraska Quad | Sat, May 2 |
| 35. | | Jose Acevedo | 46.17a | Sr | KY | Kentucky | SEC Outdoor Championships | Sun, May 17 |
| 36. | | Rodney Mims | 46.18a | Sr | TX | Texas Tech | Texas Tech Invitational | Thu, May 7 |
| 37. | | Matt Love | 46.19a | So | TX | Texas Christian | NCAA Midwest Regional | Sat, May 30 |
| 38. | | Charles Green | 46.21a | Jr | LA | Northwestern State | LSU Alumni Gold | Sat, Apr 18 |
| 39. | | Lesiba Masheto | 46.24a | Sr | IL | Illinois | Big Ten Outdoor Championships | Sun, May 17 |
| 40. | | Kevin Williams | 46.28a | So | FL | Florida State | ACC Outdoor Championships | Sat, Apr 18 |
| 41. | | Quentin Summers | 46.31a | Sr | TX | Baylor | Big 12 Outdoor Championships | Sun, May 17 |
| | Levi Brooks | 46.31a | Jr | SC | Charleston Southern | NCAA Division I East Regional | Sat, May 30 |
| 43. | | Ashton Eaton | 46.34a | Jr | OR | Oregon | Pac-10 Championships | Sun, May 17 |
| 44. | | Mychal Word | 46.37a | Sr | LA | Louisiana-Monroe | ULM Warhawk Classic | Sat, Apr 25 |
| 45. | | Kevin Bowen | 46.38a | Jr | MD | Morgan State | MEAC Outdoor Championships | Sat, May 2 |
| 46. | | Leslie Murray | 46.41a | Fr | DE | Delaware State | MEAC Outdoor Championships | Sat, May 2 |
| 47. | | RJ Anderson | 46.46a | Sr | FL | Florida | SEC Outdoor Championships | Sun, May 17 |
| 48. | | Obakeng Ngwigwa | 46.47a | Jr | SC | South Carolina | SEC Outdoor Championships | Sun, May 17 |
| 49. | | Joel Redhead | 46.48a | Sr | FL | Bethune-Cookman | NCAA Division I East Regional | Sat, May 30 |
| 50. | | Joe Greene | 46.49a | Sr | NY | Albany | America East Championships | Sat, May 2 |
| | Mike Eddy | 46.49a | So | NJ | Princeton | Heptagonals | Sun, May 10 |
| 52. | | Olajuwon Jones | 46.51a | Sr | VA | Radford | Georgia Tech Invitational | Sat, May 16 |
| | Danzell Fortson | 46.51a | So | TX | Texas | NCAA Midwest Regional | Sat, May 30 |
| 54. | | Quinten Moore | 46.59a | Jr | SC | South Carolina | Pepsi Florida Relays | Sat, Apr 4 |
| 55. | | Charles Cox | 46.62a | So | NC | North Carolina | Raleigh Relays | Sat, Mar 28 |
| 56. | | Albert Fullwood | 46.63a | Jr | LA | Louisiana Tech | WAC Outdoor Championships | Sat, May 16 |
| | Christopher Richardson | 46.63a | Jr | NC | East Carolina | Conference USA Championships | Sat, May 16 |
| 58. | | Leon Citizen | 46.65a | Sr | LA | Southern-Baton Rouge | SWAC Championships | Sun, May 3 |
| 59. | | Antonio McKay | 46.66a | So | GA | Georgia Tech | Georgia Tech Invitational | Sat, May 16 |
| | Nate Anderson | 46.66a | Jr | CA | USC | NCAA West Regional | Sat, May 30 |
| 61. | | Debodrick Walton | 46.67a | Jr | MS | Jackson State | SWAC Championships | Sun, May 3 |
| | Steven Willey | 46.67a | So | IA | Iowa | NCAA Midwest Regional | Sat, May 30 |
| 63. | | Duane Walker | 46.69a | Fr | CA | USC | Tommy "Tiny" Lister Classic | Sat, Apr 25 |
| | Chad Barlow | 46.69a | Jr | OR | Oregon | Pac-10 Championships | Sun, May 17 |
| 65. | | Zwede Hewitt | 46.71a | Fr | TX | Baylor | Michael Johnson Classic | Sat, Apr 18 |
| | Takeshi Fujiwara | 46.71a | Sr | TX | Texas-Arlington | SLC Outdoor Championships | Sun, May 10 |
| 67. | | Michael Liggins | 46.73a | Jr | TX | Baylor | Michael Johnson Classic | Sat, Apr 18 |
| | Torrin Lawrence | 46.73a | Fr | GA | Georgia | SEC Outdoor Championships | Sun, May 17 |
| 69. | | Jonathan Reid | 46.74a | Jr | NC | Wake Forest | Tiger Track Classic | Sat, Apr 4 |
| | Mike Cadau | 46.74a | Jr | PA | Penn State | Big Ten Outdoor Championships | Sun, May 17 |
| 71. | | Curtis Kock | 46.79a | Fr | TX | Texas-El Paso | Don Kirby Memorial Invitational | Sat, May 2 |
| 72. | | Thomas Keane-Dawes | 46.84a | So | MD | Maryland-Eastern Shore | MEAC Outdoor Championships | Sat, May 2 |
| 73. | | Delorean Peek | 46.88a | So | AL | Alabama State | SWAC Championships | Sun, May 3 |
| 74. | | Jeff Gudaitis | 46.90a | Jr | WA | Washington | NCAA West Regional | Sat, May 30 |
| 75. | | Christopher Harrison | 46.91a | Jr | DC | Howard | Raleigh Relays | Sat, Mar 28 |
| | Justin Kremer | 46.91a | Jr | AZ | Arizona State | Sun Angel Track Classic | Sat, Apr 11 |
| 77. | | Curtis Eaton | 46.97a | Jr | OH | Kent State | MAC Outdoor Championships | Sat, May 16 |
| 78. | | Jarrell Elliott | 46.98a | Fr | NC | North Carolina A&T | MEAC Outdoor Championships | Sat, May 2 |
| 79. | | Meikle Paschal | 46.99a | So | VA | Virginia | Jefferson Cup | Sat, Apr 4 |
| | Donte Holmes | 46.99a | So | DE | Delaware State | IC4A Championships | Sun, May 17 |
| 81. | | Carlinton Morgan | 47.00a | Jr | MD | Coppin State | IC4A Championships | Sun, May 17 |
| | Dan Johnson | 47.00a | Sr | MT | Montana State | Big Sky Conference Championships | Sat, May 16 |
| 83. | | Terrell McCombs | 47.01a | Jr | KY | Western Kentucky | Sun Belt Championships | Sun, May 10 |
| | Austin Hollimon | 47.01a | Fr | NJ | Princeton | Larry Ellis Invitational | Sat, Apr 18 |
| 85. | | Gaston Griffin | 47.03a | Sr | TX | Texas-San Antonio | Texas Twilight | Sat, Apr 18 |
| 86. | | Ja-Vell Bullard | 47.04a | Fr | VA | George Mason | CAA Championships | Sat, Apr 18 |
| | Jonathan Franklin | 47.04a | So | AL | Alabama State | SWAC Championships | Sun, May 3 |
| | Teo Bennett | 47.04a | Fr | MD | Coppin State | IC4A Championships | Sun, May 17 |
| 89. | | Rhyan Atrice | 47.05a | Fr | UT | BYU | BYU Tri Meet | Sat, May 2 |
| | Ade Alleyne-Forte | 47.05a | Fr | LA | LSU | SEC Outdoor Championships | Sun, May 17 |
| | Thomas Phillips | 47.05a | So | CA | UC Davis | Big West Championships | Sat, May 16 |
| 92. | | Justin Gaymon | 47.06a | Sr | GA | Georgia | Bulldog Limited | Sat, Apr 18 |
| | Kevin Biesenger | 47.06a | Jr | UT | BYU | Mark Faldmo Invitational | Sat, Apr 18 |
| | Dell Guy | 47.06a | Jr | TX | Texas Christian | MWC Outdoor Championships | Sat, May 16 |
| 95. | | Romaine McKay | 47.10a | Sr | KY | Western Kentucky | Sun Belt Championships | Sun, May 10 |
| 96. | | Isaiah Adams | 47.11a | Jr | WI | Wisconsin-Milwaukee | Horizon League Championships | Sun, May 3 |
| | Jamar Howard | 47.11a | So | LA | LSU | SEC Outdoor Championships | Sun, May 17 |
| 98. | | Elijah Wells | 47.12a | Sr | CA | UCLA | Oxy Invite | Sat, May 9 |
| 99. | | Christopher Cox | 47.15a | So | NJ | Seton Hall | IC4A Championships | Sun, May 17 |
| 100. | | Austin Hill | 47.19a | Jr | UT | Southern Utah | Pomona-Pitzer Invitational | Sat, Apr 4 |
| | Matt Comer | 47.19a | Sr | OH | Ohio State | Big Ten Outdoor Championships | Sun, May 17 |
| 102. | | Brandon Washington | 47.21a | So | TX | Texas Tech | Big 12 Outdoor Championships | Sun, May 17 |
| 103. | | Dave Ashcraft | 47.22a | So | MI | Central Michigan | MAC Outdoor Championships | Sat, May 16 |
| 104. | | Nate Blackwell | 47.23a | Jr | MI | Eastern Michigan | MAC Outdoor Championships | Sat, May 16 |
| 105. | | Kyle Dykhuizen | 47.24a | So | TX | Texas A&M | Big 12 Outdoor Championships | Sun, May 17 |
| 106. | | Lesley Hanna | 47.25a | So | MI | Detroit Mercy | Hillsdale College Gina Relays | Sat, Apr 25 |
| | Kwasi Obeng | 47.25a | Jr | KY | Kentucky | SEC Outdoor Championships | Sun, May 17 |
| | Ezekiel Porter | 47.25a | Jr | NY | Buffalo | MAC Outdoor Championships | Sat, May 16 |
| 109. | | Alexander Wilright | 47.26a | So | CA | UC Davis | Brutus Hamilton Invitational | Sat, Apr 25 |
| | Joel Senick | 47.26a | So | MA | Boston University | America East Championships | Sat, May 2 |
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(Total stats: 1,743)
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