| 1. | | Jeshua Anderson | 48.47a | So | WA | Washington State | NCAA Division I Championships | Sat, Jun 13 |
| 2. | | Johnny Dutch | 48.58a | So | SC | South Carolina | SEC Outdoor Championships | Sun, May 17 |
| 3. | | Justin Gaymon | 48.86a | Sr | GA | Georgia | SEC Outdoor Championships | Sun, May 17 |
| 4. | | William Wynne | 49.67a | Fr | FL | Florida | Pepsi Florida Relays | Sat, Apr 4 |
| | Joe Greene | 49.67a | Sr | NY | Albany | NCAA Division I Championships | Sat, Jun 13 |
| 6. | | Kirkland Thornton | 49.77a | Sr | NE | Nebraska | NCAA Midwest Regional | Sat, May 30 |
| 7. | | Leslie Murray | 49.83a | Fr | DE | Delaware State | NCAA Division I Championships | Sat, Jun 13 |
| 8. | | Lee Moore | 49.87a | Fr | MS | Mississippi | NCAA Division I Championships | Sat, Jun 13 |
| 9. | | Alie Beauvais | 49.99a | Jr | NY | Albany | IC4A Championships | Sun, May 17 |
| | Javier Garcia Tunon | 49.99a | Sr | FL | Florida State | NCAA Division I Championships | Sat, Jun 13 |
| 11. | | Emmanuel Mayers | 50.06a | So | MS | Mississippi State | NCAA Division I Championships | Sat, Jun 13 |
| 12. | | Amaechi Morton | 50.11a | Fr | CA | Stanford | Big Meet | Sat, Apr 18 |
| 13. | | Toby Ulm | 50.23a | Fr | DC | Georgetown | NCAA Division I East Regional | Sat, May 30 |
| 14. | | Lane Dennis | 50.25a | Sr | TX | Sam Houston State | NCAA Midwest Regional | Sat, May 30 |
| 15. | | Jake Hanson | 50.32a | Sr | CA | UC Berkeley | Pac-10 Championships | Sun, May 17 |
| 16. | | Adam Dailey | 50.48a | So | NE | Nebraska | Big 12 Outdoor Championships | Sun, May 17 |
| 17. | | Ray Varner | 50.54a | Jr | IA | Iowa | NCAA Midwest Regional | Sat, May 30 |
| 18. | | Barry Leavitt | 50.55a | Sr | WA | Washington State | NCAA Division I Championships | Sat, Jun 13 |
| 19. | | Cory Goos | 50.59a | Jr | IA | Northern Iowa | NCAA Division I Championships | Sat, Jun 13 |
| | Dan Harmsen | 50.59a | Fr | MI | Michigan | NCAA Mideast Regional | Sat, May 30 |
| 21. | | Alexander Wilright | 50.60a | So | CA | UC Davis | Cal/Nevada Championships Day 2 | Sun, Mar 29 |
| 22. | | Nick Karren | 50.73a | Sr | UT | Utah State | BYU Tri Meet | Sat, May 2 |
| 23. | | David Klech | 50.75a | So | OR | Oregon | Stanford Invitational | Sat, Mar 28 |
| | Jussi Heikkila | 50.75a | - | SC | South Carolina | UNC Elite Meet | Fri, May 8 |
| 25. | | Duane Walker | 50.78a | Fr | CA | USC | Pac-10 Championships | Sun, May 17 |
| 26. | | Carl Buchanon | 50.82a | Fr | MI | Michigan | NCAA Mideast Regional | Sat, May 30 |
| 27. | | Javi Garcia-Tunon | 50.90a | Sr | FL | Florida State | Clyde Littlefield Texas Relays | Sat, Apr 4 |
| | Patrick Lee | 50.90a | Sr | LA | LSU | NCAA Mideast Regional | Sat, May 30 |
| | Greg Offerman | 50.90a | Sr | IA | Northern Iowa | NCAA Midwest Regional | Sat, May 30 |
| 30. | | Kendrick Young | 50.93a | So | CA | Fresno State | WAC Outdoor Championships | Sat, May 16 |
| 31. | | Kenneth Medwood | 50.94a | Jr | CA | Long Beach State | Cal/Nevada Championships Day 2 | Sun, Mar 29 |
| 32. | | Thomas Phillips | 50.96a | So | CA | UC Davis | Brutus Hamilton Invitational | Sat, Apr 25 |
| 33. | | Jason Mitchell | 50.99a | Sr | TX | Prairie View A&M | NCAA Midwest Regional | Sat, May 30 |
| | Nick Makukutu | 50.99a | So | NE | Nebraska | Nebraska Quad | Sat, May 2 |
| 35. | | Val-Pierre Dai'Re | 51.00a | Jr | CA | Fresno State | Brutus Hamilton Invitational | Sat, Apr 25 |
| 36. | | Glenn Fowler | 51.05a | Sr | FL | South Florida | Big East Championships | Sun, May 3 |
| | Carson Blanks | 51.05a | Fr | MS | Mississippi | SEC Outdoor Championships | Sun, May 17 |
| 38. | | Jamele Mason | 51.10a | Fr | TX | Texas Tech | Texas Tech Invitational | Thu, May 7 |
| 39. | | Anthony Burris | 51.11a | Jr | CT | Connecticut | Big East Championships | Sun, May 3 |
| 40. | | Lehann Fourie | 51.22a | So | NE | Nebraska | Big 12 Outdoor Championships | Sun, May 17 |
| 41. | | Zach Dawson | 51.24a | Jr | OK | Oklahoma | Sooner Twilight | Sat, May 9 |
| 42. | | Harold Sims | 51.26a | Jr | NC | Campbell | NCAA Division I East Regional | Sat, May 30 |
| 43. | | Eric Bailey | 51.30a | So | OK | Oklahoma | NCAA Midwest Regional | Sat, May 30 |
| 44. | | Bryan Payne | 51.31a | Jr | UT | BYU | Utah Twilight | Wed, May 6 |
| 45. | | Tim O'Donnell | 51.35a | Sr | VA | Liberty | Big South Outdoor Championships | Sat, Apr 18 |
| | Chris Davis | 51.35a | So | MO | Missouri | NCAA Mideast Regional | Sat, May 30 |
| 47. | | Balazs Molnar | 51.37a | Jr | IN | Notre Dame | Big East Championships | Sun, May 3 |
| | Kelton Cumberbatch | 51.37a | Sr | NY | Manhattan | IC4A Championships | Sun, May 17 |
| 49. | | Roscoe Payne | 51.41a | Fr | TN | Middle Tennessee State | Sun Belt Championships | Sun, May 10 |
| | Mikel Thomas | 51.41a | Sr | KY | Kentucky | SEC Outdoor Championships | Sun, May 17 |
| 51. | | Zach Plinario | 51.43a | Jr | TX | Texas Tech | NCAA Midwest Regional | Sat, May 30 |
| 52. | | Aundrea Williams | 51.46a | Jr | TX | Texas-Arlington | NCAA Midwest Regional | Sat, May 30 |
| 53. | | Cody Wisslead | 51.48a | So | IL | Illinois | Big Ten Outdoor Championships | Sun, May 17 |
| 54. | | Daniel Kinney | 51.52a | Sr | DC | Howard | NCAA Division I East Regional | Sat, May 30 |
| 55. | | Jason Perez | 51.54a | So | TX | Houston | Conference USA Championships | Sat, May 16 |
| 56. | | Richard Lowe | 51.55a | So | TN | Memphis | Memphis Tiger Invitational | Sat, Apr 18 |
| 57. | | Taylor Pebley | 51.56a | Jr | UT | Weber State | BYU Tri Meet | Sat, May 2 |
| | Paul Steinke | 51.56a | Jr | NC | Gardner-Webb | Georgia Tech Invitational | Sat, May 16 |
| 59. | | J Hopkins | 51.57a | Fr | WA | Washington State | The Beach Invitational | Sat, Apr 18 |
| 60. | | John Hewitt | 51.58a | Jr | TN | Tennessee | SEC Outdoor Championships | Sun, May 17 |
| | Thaddeus Gordon | 51.58a | Jr | TX | Baylor | NCAA Midwest Regional | Sat, May 30 |
| 62. | | Eric Lund | 51.59a | So | NE | Nebraska | Nebraska Quad | Sat, May 2 |
| 63. | | David Aristil | 51.64a | Fr | FL | South Florida | LSU Alumni Gold | Sat, Apr 18 |
| 64. | | Chris Titsworth | 51.66a | Sr | AZ | Arizona | NCAA West Regional | Sat, May 30 |
| 65. | | Gordon Smith | 51.67a | Sr | NC | North Carolina A&T | MEAC Outdoor Championships | Sat, May 2 |
| | Trevor Habberstad | 51.67a | So | WA | Washington State | Pac-10 Championships | Sun, May 17 |
| 67. | | Mychal Word | 51.71a | Sr | LA | Louisiana-Monroe | LSU Alumni Gold | Sat, Apr 18 |
| 68. | | Roberto Archibold | 51.72a | Jr | AZ | Arizona State | Arizona Double Dual | Sat, May 2 |
| 69. | | Lance Walker | 51.74a | Jr | UT | BYU | Utah Twilight | Wed, May 6 |
| 70. | | Cory Nelms | 51.75a | Jr | FL | Miami (FL) | Georgia Tech Invitational | Sat, May 16 |
| 71. | | Jordan Pitts | 51.76a | So | TX | Texas Christian | LSU Relays | Sat, Mar 28 |
| | Adlus Wiltz | 51.76a | Jr | LA | Southeast Louisiana | LSU Alumni Gold | Sat, Apr 18 |
| 73. | | Kyle Edmonds | 51.78a | Jr | CT | Connecticut | IC4A Championships | Sun, May 17 |
| 74. | | Eric Cray | 51.80a | So | FL | Bethune-Cookman | MEAC Outdoor Championships | Sat, May 2 |
| 75. | | Nigel Joseph | 51.82a | So | CO | Colorado State | NCAA Midwest Regional | Sat, May 30 |
| 76. | | Devon Watlington | 51.84a | Jr | NC | North Carolina-Wilmington | IC4A Championships | Sun, May 17 |
| 77. | | Lino Reyes | 51.92a | So | MS | Alcorn State | LSU Relays | Sat, Mar 28 |
| | Cylend Simmons | 51.92a | So | NE | Nebraska | John McDonnell Invitational | Sat, Apr 18 |
| 79. | | Marshall Ackley | 51.94a | Jr | OR | Oregon | Pac-10 Championships | Sun, May 17 |
| 80. | | Adams Abdulrazaaq | 52.06a | So | VA | Virginia | ACC Outdoor Championships | Sat, Apr 18 |
| | Kevin Ahlstrom | 52.06a | Jr | UT | BYU | Mark Faldmo Invitational | Sat, Apr 18 |
| 82. | | Rob Skidmore | 52.07a | Jr | UT | BYU | BYU Robison Invitational | Sat, Apr 25 |
| 83. | | Kris Gehrke | 52.09a | Jr | IL | Eastern Illinois | Ohio Valley Conference Championships | Sat, May 2 |
| 84. | | D'Korian Ford | 52.12a | Fr | TX | Houston | Conference USA Championships | Sat, May 16 |
| 85. | | Marcelles Atkinson | 52.15a | So | LA | Louisiana Tech | WAC Outdoor Championships | Sat, May 16 |
| 86. | | Justin Grinstead | 52.16a | Jr | MA | Harvard | Heptagonals | Sun, May 10 |
| 87. | | Darryl Elston | 52.19a | Sr | AZ | Arizona State | ASU Invitational | Sat, Mar 28 |
| 88. | | Tyrell Ross | 52.20a | Jr | NE | Nebraska | Big 12 Outdoor Championships | Sun, May 17 |
| 89. | | Jhak Keegan | 52.22a | Sr | AL | Auburn | SEC Outdoor Championships | Sun, May 17 |
| | Eric Alejandro | 52.22a | - | MI | Eastern Michigan | University of Windsor Open | Sat, May 16 |
| 91. | | Travis Swaggard | 52.23a | Sr | SC | Clemson | Pepsi Florida Relays | Sat, Apr 4 |
| 92. | | Keith Williams | 52.33a | Sr | UT | Utah State | Rafer Johnson/Jackie Joyner Kersee Invitational | Sat, Apr 11 |
| 93. | | Hendrik Maartens | 52.44a | Fr | IL | Illinois | MSU Legacy Meet | Sat, Apr 18 |
| | Matthew Jones | 52.44a | So | CO | Air Force | MWC Outdoor Championships | Sat, May 16 |
| 95. | | Durell Coleman | 52.45a | Jr | CA | Stanford | Payton Jordan Cardinal Invitational | Sat, May 2 |
| 96. | | Phillip Warsaw | 52.49a | Sr | NC | Wake Forest | Wake Forest Open | Sat, Mar 21 |
| 97. | | Jay Newman | 52.50a | So | TX | Sam Houston State | J. Fred Duckett Twilight | Wed, Apr 29 |
| 98. | | Anthony Bertoli | 52.51a | Sr | IN | Indiana State | Pacesetter Invitational | Sat, May 2 |
| 99. | | Wade McGaha | 52.52a | Jr | LA | Louisiana Tech | WAC Outdoor Championships | Sat, May 16 |
| | Darryl Cloud | 52.52a | Jr | TX | Houston | Conference USA Championships | Sat, May 16 |
| 101. | | Nate Page | 52.55a | Sr | UT | BYU | Utah Twilight | Wed, May 6 |
| 102. | | Nick Huber | 52.56a | Fr | NY | Cornell | IC4A Championships | Sun, May 17 |
| 103. | | Chris Rutherford | 52.58a | Fr | NJ | Monmouth (NJ) | NEC Championships | Sat, May 2 |
| 104. | | Jonathan Hall | 52.59a | Jr | MA | Northeastern | IC4A Championships | Sun, May 17 |
| 105. | | Rodney Harris | 52.61a | Sr | LA | Southern-Baton Rouge | TSU Relays | Sat, Mar 21 |
| | Brandon Tucker | 52.61a | Fr | TX | Texas Tech | Big 12 Outdoor Championships | Sun, May 17 |
| | Seth Mabry | 52.61a | Fr | TX | Texas A&M | Big 12 Outdoor Championships | Sun, May 17 |
| 108. | | Rob Fiorillo | 52.62a | Fr | MI | Michigan | EMU Twilight | Sat, Apr 18 |
| | Stefan Goodridge | 52.62a | So | PA | Villanova | Big East Championships | Sun, May 3 |
| 110. | | Collin Shurbet | 52.63a | Fr | TX | Rice | Conference USA Championships | Sat, May 16 |
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(Total stats: 734)
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