| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 47.51 | Smith, Domnic (2016) (Creekside, FL) (US#50) | USATF World Youth Trials(IL), 2015-07-01(#4) |
| B-400 | 2 | 47.88 | Smith Jr, Dominic (2016) (Creekside, FL) (US#93) | FL 3A State Meet(FL), 2015-05-02(#3) |
| B-400 | 3 | 48.02 | Smith Jr, Dominic M (2016) (Creekside, FL) | Golden South Classic(FL), 2015-05-23(#5) |
| | | National Elites above. State Elites below | | |
| B-400 | 4 | 48.96 | Bonner, Corey (2016) (Fort Walton Beach, FL) | FL 3A State Meet(FL), 2015-05-02(#6) |
| B-400 | 5 | 49.81 | Boswell, Alex (2015) (Niceville, FL) | FL 3A Region 1(FL), 2015-04-23(#3) |
| B-400 | 6 | 49.98 | Germain, Ryan (2017) (Paxon, FL) | FL 2A Region 1(FL), 2015-04-21(#7) |
| B-400 | 7 | 50.06 | Roberts, Bobby (2015) (Lincoln, FL) | AAU JO Region 9 Qualifier - Tallahassee(FL), 2015-06-28(#2) |
| B-400 | 7 | 50.06 | Manning, Kevoughn (Booker T. Washington, FL) | Steven Garst Invitational(FL), 2015-02-28(#2) |
| B-400 | 9 | 50.09 | Canady, Braxton (2016) (Paxon, FL) | TFA Royal Open(FL), 2015-02-21(#2) |
| B-400 | 10 | 50.21 | London, David (2015) (Leon, FL) | FL 3A Region 1(FL), 2015-04-23(#3) |
| B-400 | 11 | 50.40 | Campbell, D'Eldrick (Leon, FL) | Jimmy Everett Invitational(FL), 2015-03-05(#1) |
| B-400 | 12 | 50.65 | Springer, Alijah (2015) (Milton, FL) | FL 3A District 1(FL), 2015-04-15(#2) |
| B-400 | 13 | 50.71 | Fredrickson, Devin (2017) (Creekside, FL) | FL 3A Region 1(FL), 2015-04-23(#8) |
| B-400 | 14 | 50.79 | Bonner, Corey (18) (Fort Walton Beach, FL) | Seahawks Open(FL), 2015-02-14(#1) |
| B-400 | 15 | 50.81 | Bond, Dmonte (2016) (Crestview, FL) | FL 3A Region 1(FL), 2015-04-23(#9) |
| B-400 | 16 | 50.95 | Perkins, Taylor (2015) (Booker T. Washington, FL) | FSU Relays - Friday(FL), 2015-03-26(#7) |
| B-400 | 17 | 51.07 | Cantey, Avery (2015) (Pace, FL) | Louie Bing Classic(FL), 2015-02-21(#10) |
| B-400 | 18 | 51.43 | Aulenbach, Cory (2015) (Bartram Trail, FL) | St. John's River County Championships(FL), 2015-04-01(#3) |
| B-400 | 19 | 51.47 | Brown, Josh (Booker T. Washington, FL) | Aggie Invitational(FL), 2015-03-14(#3) |
| B-400 | 20 | 51.53 | Defense, Hasan (2015) (Ed White, FL) | FL 3A District 3(FL), 2015-04-14(#3) |
| B-400 | 21 | 51.55 | Peter, Justin (2017) (Leon, FL) | USATF JO Region 16 Qualifier(FL), 2015-07-12(#7) |
| B-400 | 22 | 51.59 | Forbes, Leander (2017) (Leon, FL) | FSU Relays - Friday(FL), 2015-03-26(#13) |
| B-400 | 23 | 51.62 | Melendez, William (2015) (Bartram Trail, FL) | FL 3A District 4(FL), 2015-04-14(#6) |
| B-400 | 24 | 51.63 | Barnes, Abraham (2015) (Chiles, FL) | Golden South Classic(FL), 2015-05-23(#2) |
| B-400 | 25 | 51.71 | Adams, Qeandre (Booker T. Washington, FL) | Steven Garst Invitational(FL), 2015-02-28(#4) |
| B-400 | 26 | 51.78 | Reid, Donovan (2016) (Englewood, FL) | FL 3A District 3(FL), 2015-04-14(#4) |
| B-400 | 27 | 51.80 | Williams, Holly (2017) (Lincoln, FL) | FL 3A District 3(FL), 2015-04-14(#5) |
| B-400 | 28 | 51.90 | Tillman, Randy (2015) (Creekside, FL) | Craig Speziale Sprint/Hurdle/Field Event(FL), 2015-04-03(#1) |
| B-400 | 28 | 51.90 | Baclig, Jeremiah (2018) (Paxon, FL) | Wolfpack Classic(FL), 2015-03-27(#2) |
| B-400 | 30 | 51.95 | Mckinney, Davis (2015) (Fort Walton Beach, FL) | Steven Garst Invitational(FL), 2015-02-28(#7) |
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| | | See more performances for B-400 | | |
