| Event | Rank | Mark | By | Meet |
| | | National Elites above. State Elites below | | |
| B-400 | 1 | 49.39 | Smith, Stanley (2016) (Lake Wales, FL) | Osceola Kowboy Invitational(FL), 2015-03-14(#3) |
| B-400 | 2 | 49.60 | Johnson, Jamar (2015) (Bayshore, FL) | SC Class AAA Qualifier(SC), 2015-05-09(#2) |
| B-400 | 3 | 50.78 | Bradford, Luke (2015) (Clewiston, FL) | FL 2A Region 3(FL), 2015-04-23(#3) |
| B-400 | 4 | 51.00 | Yrelus, Mackenson (2018) (Immokalee, FL) | Collier County Athletic Conference(FL), 2015-03-25(#2) |
| B-400 | 5 | 51.05 | Houfek, Noah (2016) (Oasis, FL) | FL 2A Region 3(FL), 2015-04-23(#4) |
| B-400 | 6 | 51.10 | Cassues, Sterlin (2015) (LaBelle, FL) | FL 2A District 12(FL), 2015-04-17(#1) |
| B-400 | 7 | 51.11 | Henrikson, Leif (2015) (Mckeel , FL) | FL 2A District 9(FL), 2015-04-09(#2) |
| B-400 | 8 | 51.21 | Stewart, Rashaad (2017) (Clearwater Central Catholic, FL) | FL 1A Region 2(FL), 2015-04-23(#4) |
| B-400 | 9 | 51.23 | Taviere, Yannick (2015) (Lakewood, FL) | FL 2A Region 3(FL), 2015-04-23(#5) |
| B-400 | 10 | 51.66 | Outlaw, Marquise (2015) (Dunbar, FL) | Lee County Athletic Association(FL), 2015-03-21(#2) |
| B-400 | 11 | 51.80 | Augustine, Cj (Berkeley Prep, FL) | IMG Invitational(FL), 2015-03-14(#5) |
| B-400 | 12 | 51.99 | Waldon, Tuquan (2015) (Tenoroc, FL) | Polk County Championships(FL), 2015-03-21(#3) |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | See more performances for B-400 | | |
