| 1. | Sr | | Amaechi Morton | 48.79a | CA | Stanford | NCAA Division I Outdoor Track and Field Championships | Fri, Jun 8 |
| 2. | Sr | | Jamele Mason | 48.89a | TX | Texas Tech | NCAA Division I Outdoor Track and Field Championships | Fri, Jun 8 |
| 3. | Jr | | Reggie Wyatt | 49.11a | CA | USC | NCAA Division I Outdoor Track and Field Championships | Fri, Jun 8 |
| 4. | So | | Keyunta Hayes | 49.38a | TX | Texas-San Antonio | NCAA Division I Outdoor Track and Field Championships | Fri, Jun 8 |
| 5. | Sr | | David Aristil | 49.54a | FL | South Florida | NCAA Division I Outdoor Track and Field Championships | Fri, Jun 8 |
| 6. | Fr | | Michael Stigler | 49.91a | KS | Kansas | NCAA Division I Outdoor Track and Field Championships | Wed, Jun 6 |
| 7. | Jr | | Steven White | 50.07a | TX | North Texas | North Texas Spring Classic | Sat, Apr 7 |
| 8. | Sr | | Chris Carter | 50.08a | UT | BYU | NCAA Division I Outdoor Track and Field Championships | Wed, Jun 6 |
| 9. | Jr | | Jibri Victorian | 50.10a | MD | Coppin State | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 10. | Fr | | Antonio Blanks | 50.19a | OH | Ohio State | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 11. | So | | Ali Arastu | 50.26a | MI | Michigan | NCAA Division I Outdoor Track and Field Championships | Wed, Jun 6 |
| 12. | Jr | | Nathan Arnett | 50.29a | MS | Mississippi State | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 13. | Sr | | Carson Blanks | 50.30a | MS | Mississippi | SEC Outdoor Track & Field Championships | Thu, May 10 |
| Jr | | Caleb Cross | 50.30a | AR | Arkansas | SEC Outdoor Track & Field Championships | Thu, May 10 |
| 15. | Sr | | Emmanuel Mayers | 50.46a | MS | Mississippi State | SEC Outdoor Track & Field Championships | Thu, May 10 |
| So | | Andre Walsh | 50.46a | MD | Maryland-Eastern Shore | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 17. | Sr | | Eric Cray | 50.56a | OK | Oklahoma | NCAA Division I Prelims - West Regionals | Fri, May 25 |
| 18. | Sr | | Jermaine Lowery | 50.65a | PA | Pittsburgh | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 19. | Fr | | Javonte Lipsey | 50.67a | NC | North Carolina | ACC Championships | Sat, Apr 21 |
| 20. | So | | Miles Ukaoma | 50.71a | NE | Nebraska | Drake Relays 2012 | Sat, Apr 28 |
| 21. | Jr | | Jeffery Gibson | 50.72a | OK | Oral Roberts | NCAA Division I Outdoor Track and Field Championships | Wed, Jun 6 |
| 22. | Sr | | Zack Ray | 50.83a | MD | Maryland | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 23. | Sr | | Toby Ulm | 50.89a | DC | Georgetown | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 24. | Sr | | Marcus Pope | 50.91a | KY | Western Kentucky | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 25. | Jr | | Spencer Adams | 50.96a | SC | Clemson | ACC Championships | Sat, Apr 21 |
| 26. | Jr | | Quinton Harley | 51.01a | NC | East Carolina | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 27. | Sr | | Kevin Cunningham | 51.02a | TX | McMurry University | Clyde Littlefield Texas Relays 85th | Wed, Mar 28 |
| 28. | So | | Trevor Brown | 51.08a | CO | Colorado State | Mountain West Conference Outdoor Championships | Sat, May 12 |
| 29. | So | | Gabriel El Hanbli | 51.12a | TX | Baylor | Drake Relays 2012 | Sat, Apr 28 |
| Jr | | Reynaldo Radlin | 51.12a | NC | North Carolina | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 31. | Jr | | Ethan Holmes | 51.17a | IA | Iowa | Drake Relays 2012 | Sat, Apr 28 |
| 32. | Sr | | Phillip Adams | 51.21a | GA | Georgia | SEC Outdoor Track & Field Championships | Thu, May 10 |
| 33. | So | | Matthew Viverette | 51.25a | TX | Sam Houston State | Twilight Invitational | Thu, May 3 |
| Jr | | Demetrius Rooks | 51.25a | NJ | Rowan | NCAA DIII Outdoor Championships | Sat, May 26 |
| 35. | Fr | | Kyle Dunn | 51.26a | AR | Arkansas | Drake Relays 2012 | Sat, Apr 28 |
| 36. | Fr | | Drew Branch | 51.29a | GA | Georgia | SEC Outdoor Track & Field Championships | Thu, May 10 |
| 37. | Fr | | Gregory Coleman | 51.30a | TX | Texas A&M | USA Junior Outdoor Track & Field Championships | Fri, Jun 15 |
| 38. | Jr | | Cordell Livingston | 51.31a | NC | North Carolina-Charlotte | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 39. | Jr | | Darryl Wyrick | 51.33a | TX | Texas-San Antonio | Bobcat Classic 2012 | Sat, Apr 28 |
| 40. | So | | Tibor Koroknai | 51.36a | NE | Nebraska | NCAA Division I Prelims - West Regionals | Fri, May 25 |
| 41. | Jr | | Sergio Rios | 51.39a | TX | Texas A&M-Kingsville | Clyde Littlefield Texas Relays 85th | Wed, Mar 28 |
| Sr | | William Donelson | 51.39a | TX | Prairie View A&M | J Fred Duckett Rice Twilight | Fri, Apr 20 |
| 43. | So | | Stephen Vitale | 51.40a | MA | Boston University | IC4A Championships | Sun, May 13 |
| 44. | Sr | | Roscoe Payne | 51.43a | TN | Middle Tennessee State | Rhodes Open | Sat, Mar 17 |
| Sr | | J Hopkins | 51.43a | WA | Washington State | Mt. SAC Relays | Fri, Apr 20 |
| 46. | Sr | | Trey Charles | 51.45a | MD | Morgan State | Pepsi Florida Relays | Sat, Apr 7 |
| Jr | | William Lindsey | 51.45a | IL | Southern Illinois-Edwardsville | Dr. Keeler Invitational | Fri, May 11 |
| 48. | Sr | | Terry Benson | 51.50a | TN | Tennessee | SEC Outdoor Track & Field Championships | Thu, May 10 |
| 49. | Sr | | Christopher Lawson | 51.51a | CA | Long Beach State | Cal/Nevada Championships | Sun, Apr 1 |
| 50. | Sr | | Jacob Yowell | 51.57a | CA | UC Irvine | NCAA Division I Prelims - West Regionals | Thu, May 24 |
| 51. | Fr | | David Voland | 51.60a | IL | Augustana (IL) | NCAA DIII Outdoor Championships | Sat, May 26 |
| 52. | Sr | | Patrick Plank | 51.61a | WI | Wisconsin | Triton Invitational | Sat, Apr 28 |
| Sr | | Bryce Bergman | 51.61a | CO | Air Force | Mountain West Conference Outdoor Championships | Sat, May 12 |
| Sr | | Jerome Lowery | 51.61a | PA | Pittsburgh | IC4A Championships | Sun, May 13 |
| 55. | Sr | | Eric Suprenant | 51.62a | CA | Cal Poly SLO | NCAA Division I Prelims - West Regionals | Fri, May 25 |
| 56. | So | | R J Frasier | 51.65a | CA | UCLA | USC vs. UCLA Dual Meet | Sun, Apr 29 |
| 57. | Jr | | Ethan Freet | 51.66a | OH | Ohio Wesleyan | NCAA DIII Outdoor Championships | Sat, May 26 |
| So | | Corey Wilch | 51.66a | WI | Wisconsin-Oshkosh | NCAA DIII Outdoor Championships | Sat, May 26 |
| 59. | Sr | | Kenny McClain | 51.67a | NY | Cornell | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 60. | So | | Joshua Smith | 51.74a | TX | Texas-San Antonio | Bobcat Classic 2012 | Sat, Apr 28 |
| So | | Brandon Williams | 51.74a | TN | Memphis | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 62. | Sr | | Jon DeGrave | 51.80a | IA | Drake | MVC Outdoor Championships | Sun, May 13 |
| 63. | Sr | | Duane Walker | 51.81a | CA | USC | Ben Brown | Sat, Mar 10 |
| 64. | Jr | | Rolando Trammel | 51.82a | ID | Boise State | NCAA Division I Prelims - West Regionals | Thu, May 24 |
| 65. | Jr | | Keaton Rickels | 51.86a | IA | Iowa | NCAA Division I Prelims - West Regionals | Fri, May 25 |
| 66. | Sr | | Sabiel Anderson | 51.89a | MO | Lincoln (MO) | Drake Relays 2012 | Sat, Apr 28 |
| 67. | Sr | | Jeff Smith | 52.03a | TX | Tarleton State | Clyde Littlefield Texas Relays 85th | Wed, Mar 28 |
| So | | Charles Lewis | 52.03a | NM | New Mexico | Texas Tech Invitational | Sat, May 5 |
| 69. | Jr | | Nicoy Hines | 52.04a | PA | Villanova | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 70. | Sr | | Sutton Coleman | 52.06a | IN | Rose-Hulman | NCAA DIII Outdoor Championships | Sat, May 26 |
| 71. | Sr | | James Thurn | 52.10a | LA | LSU | SEC Outdoor Track & Field Championships | Thu, May 10 |
| 72. | Fr | | Juan Stenner | 52.11a | SC | South Carolina | Pepsi Florida Relays | Sat, Apr 7 |
| 73. | So | | Roy Smith | 52.12a | NC | North Carolina | ACC Championships | Sat, Apr 21 |
| So | | Lavon Collins | 52.12a | TX | Texas Christian | Michael Johnson/Dr. Pepper Classic | Sat, Apr 21 |
| Jr | | George Empty | 52.12a | VA | George Mason | IC4A Championships | Sun, May 13 |
| 76. | Sr | | Collin Shurbet | 52.13a | TX | Rice | J Fred Duckett Rice Twilight | Fri, Apr 20 |
| 77. | Sr | | Jake Deavers | 52.18a | CA | Cal Poly Pomona | Cal/Nevada Championships | Sat, Mar 31 |
| Jr | | Karlis Daube | 52.18a | KY | Western Kentucky | Pepsi Florida Relays | Sat, Apr 7 |
| 79. | Jr | | Kyle MacIntosh | 52.20a | CO | Colorado | Mt. SAC Relays | Fri, Apr 20 |
| 80. | Sr | | Clark Coyle | 52.23a | AZ | Grand Canyon | Don Kirby Invitational | Sat, Apr 7 |
| 81. | So | | Brian Word | 52.26a | MS | Mississippi | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 82. | Sr | | Sean Wren | 52.27a | NY | SUNY Oneonta | NCAA DIII Outdoor Championships | Sat, May 26 |
| 83. | Sr | | Tarem Cannonier | 52.28a | PA | Lincoln U (PA) | IC4A Championships | Sun, May 13 |
| 84. | So | | Jodi-Rae Blackwood | 52.29a | NE | Nebraska | NCAA Division I Prelims - West Regionals | Thu, May 24 |
| 85. | Sr | | Andrew Pennington | 52.31a | AR | Arkansas | ASU-Arkansas-SDSU-LSU Tri-Meet | Sat, Apr 14 |
| 86. | So | | Cliff Leake | 52.32a | AZ | Arizona | NCAA Division I Prelims - West Regionals | Thu, May 24 |
| 87. | Sr | | Adam Salzmann | 52.33a | CO | Colorado | NCAA Division I Prelims - West Regionals | Thu, May 24 |
| 88. | Sr | | Bobby Workman | 52.35a | CA | CS Northridge | Cal/Nevada Championships | Sun, Apr 1 |
| 89. | Fr | | Michael Koger | 52.42a | CA | UC Riverside | Cal/Nevada Championships | Sun, Apr 1 |
| 90. | Sr | | Joe Yoder | 52.44a | OH | Heidelberg | GVSU Last Chance | Sat, May 12 |
| 91. | Jr | | Akido Noel | 52.46a | NC | St Augustine's | Pepsi Florida Relays | Sat, Apr 7 |
| 92. | Fr | | Jamel Sams | 52.48a | LA | Louisiana-Monroe | Clyde Littlefield Texas Relays 85th | Wed, Mar 28 |
| 93. | So | | Max Tuttle | 52.49a | IN | Indiana State | MVC Outdoor Championships | Sun, May 13 |
| 94. | Jr | | Devon Burroughs | 52.54c | NC | St Augustine's | Raleigh Relays | Sat, Mar 31 |
| 95. | So | | Ryan Newtoff | 52.55a | IA | Northern Iowa | MVC Outdoor Championships | Sun, May 13 |
| 96. | So | | Kyle Long | 52.58a | KS | Wichita State | MVC Outdoor Championships | Sun, May 13 |
| Fr | | Justin Johnson | 52.58a | WI | St Norbert | Gregory Invitational | Fri, May 18 |
| 98. | Sr | | Darryl Hayes | 52.67a | TX | Sam Houston State | Clyde Littlefield Texas Relays 85th | Wed, Mar 28 |
| 99. | Jr | | Kori Meshaw | 52.69a | PA | Kutztown | Lannigan Last Chance | Sat, May 12 |
| 100. | So | | Chris Teitsma | 52.73a | MI | Grand Valley State | GVSU Al Owens | Sat, Apr 21 |
| Sr | | Grant Bughman | 52.73a | WI | Wisconsin | NCAA Division I Prelims - West Regionals | Thu, May 24 |
| 102. | So | | Josh Thomas | 52.74c | IL | Southern Illinois-Edwardsville | Billy Hayes Invitational | Fri, May 4 |
| 103. | So | | David Namnath | 52.75a | CA | Cal Poly SLO | Mt. SAC Relays | Fri, Apr 20 |
| 104. | Jr | | James Burroughs | 52.76a | NJ | Rider | IC4A Championships | Sun, May 13 |
| 105. | Sr | | Ryan Hindes | 52.78a | IN | Indiana (IN) | Polytan Invitational | Sun, Apr 22 |
| 106. | Sr | | Jordan Frazier | 52.80a | KY | Louisville | NCAA Championships-East Preliminary Round | Sat, May 26 |
| 107. | Fr | | Nick Efkamp | 52.81a | IA | Iowa State | Mt. SAC Relays | Fri, Apr 20 |
| 108. | Sr | | Rob Arent | 52.82a | PA | Bucknell | Colonial Relays | Sat, Apr 7 |
| So | | Maurice Jones | 52.82a | MI | Hillsdale | Hillsdale College Gina Relays | Thu, Apr 26 |
| Sr | | Arthur Combest | 52.82a | TN | Tennessee State | Ohio Valley Conference Finals | Sat, May 5 |
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(Total stats: 862)
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