| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 45.96 | London, Wil (2015) (Waco, TX) (US#4) | TX Meet of Champions(TX), 2015-05-23(#1) |
| B-400 | 2 | 46.42 | Age, Eric (2015) (Lancaster, TX) (US#11) | TX 5A District 14 Lancaster(TX), 2015-04-16(#1) |
| B-400 | 3 | 47.61 | Allison, Champion (2017) (George Ranch, TX) (US#56) | AAU JO Region 17 Qualifier(TX), 2015-07-04(#1) |
| B-400 | 4 | 47.80 | Sawyer, Jonathon (2015) (Manor, TX) (US#79) | TX 5A Region 3 Huntsville(TX), 2015-05-02(#2) |
| B-400 | 5 | 47.92 | Ehiemua, Shamon (2017) (Marshall, TX) (US#100) | Track Houston Championship(TX), 2015-05-30(#1) |
| B-400 | 6 | 47.93 | Grimes, Norman (2016) (Canyon, TX) | Great Southwest Classic(NM), 2015-06-06(#9) |
| B-400 | 7 | 48.03 | Gonzalez, Brian (2016) (Bel Air, TX) | Willie Williams Classic(AZ), 2015-03-21(#1) |
| B-400 | 8 | 48.07 | Patterson, Isaiah (2015) (Moody, TX) | TX 5A Region 4 San Antonio(TX), 2015-05-02(#1) |
| B-400 | 9 | 48.11 | Murphy, Drake (2015) (Ball, TX) | TX 5A Region 3 Huntsville(TX), 2015-05-02(#3) |
| B-400 | 10 | 48.16 | Nowak, Jake (2015) (Vandegrift, TX) | TX 5A Region 4 San Antonio(TX), 2015-05-02(#2) |
| | | National Elites above. State Elites below | | |
| B-400 | 11 | 48.42 | Sheriff, Va-Sheku (2015) (Caprock, TX) | TX 5A District 3 Dumas(TX), 2015-04-17(#1) |
| B-400 | 11 | 48.42 | Palmer, Isaiah (2017) (Liberty, TX) | TX 5A Region 2 Arlington(TX), 2015-05-02(#2) |
| B-400 | 11 | 48.42 | Pfiester, Riley (2015) (Creekview, TX) | TX 5A Region 2 Arlington(TX), 2015-05-02(#3) |
| B-400 | 14 | 48.52 | Hawkins, Eric (2017) (Pine Tree, TX) | TX 5A Region 2 Arlington(TX), 2015-05-02(#3) |
| B-400 | 15 | 48.56 | Fuller, Aaron (2016) (Lovejoy, TX) | TX 5A Region 2 Arlington(TX), 2015-05-02(#4) |
| B-400 | 16 | 48.61 | Isom, John (2016) (Marshall, TX) | Rice Victor Lopez Classic(TX), 2015-04-04(#4) |
| B-400 | 17 | 48.77 | Banks, Michael (2015) (Ozen, TX) | Clear Springs Relays(TX), 2015-04-02(#1) |
| B-400 | 18 | 48.79 | Deboskie, Julien (2015) (McKinney North, TX) | TX 5A District 10 Wylie(TX), 2015-04-09(#2) |
| B-400 | 19 | 48.82 | Marquez, Isaac (2015) (Boswell, TX) | TX 5A Region 1 Lubbock(TX), 2015-05-02(#2) |
| B-400 | 19 | 48.82 | Franklin, Jemiyah (2017) (Temple, TX) | TX 5A Area 17-18 College Station(TX), 2015-04-23(#3) |
| B-400 | 21 | 48.87 | Jordan, Carl (2016) (Humble, TX) | TX 5A Region 3 Huntsville(TX), 2015-05-02(#4) |
| B-400 | 22 | 48.92 | Ford, Roderick (2017) (Ft Worth Southwest, TX) | TX 5A Region 1 Lubbock(TX), 2015-05-02(#3) |
| B-400 | 22 | 48.92 | Hollis, Jordan (2017) (Red Oak, TX) | USATF JO Southwest Assn(TX), 2015-06-20(#8) |
| B-400 | 24 | 49.02 | Crocker, Austin (2017) (Reagan, TX) | AAU JO Region 19 Qualifier(TX), 2015-07-01(#1) |
| B-400 | 25 | 49.04 | Moses, Terrel (2015) (Elkins, TX) | TX 5A District 23 Ft Bend(TX), 2015-04-18(#2) |
| B-400 | 26 | 49.05 | Davis, Lamarque (Tre) (2017) (Timberview, TX) | TX 5A Region 2 Arlington(TX), 2015-05-02(#6) |
| B-400 | 27 | 49.06 | Contreras, Ricardo (2016) (Bastrop, TX) | TX 5A District 26 Cedar Creek(TX), 2015-04-09(#1) |
| B-400 | 28 | 49.07 | Shepard, Isaac (2015) (Seguin, TX) | TX 5A Area 13-14 Lancaster(TX), 2015-04-23(#2) |
| B-400 | 29 | 49.08 | Davis, Lamarque (2017) (Timberview, TX) | TX 5A Area 13-14 Lancaster(TX), 2015-04-23(#3) |
| B-400 | 30 | 49.14 | Deadmon, Bryce (2015) (Ridge Point, TX) | TX 5A District 23 Ft Bend(TX), 2015-04-18(#3) |
| B-400 | 31 | 49.26 | Olguin, Reagan (2015) (Vela, TX) | TX 5A District 31 Rio Grande City(TX), 2015-04-17(#1) |
| B-400 | 32 | 49.36 | Julian, Conner (2015) (Creekview, TX) | TX 5A Region 2 Arlington(TX), 2015-05-02(#8) |
| B-400 | 33 | 49.39 | Landez, Sean (2015) (Sharyland, TX) | TX 5A District 31 Rio Grande City(TX), 2015-04-17(#2) |
| B-400 | 34 | 49.41 | Carr, Fred (2016) (George Ranch, TX) | Rice All-Comers 5-28(TX), 2015-05-28(#2) |
| B-400 | 35 | 49.45 | Rubio, Javier (2015) (Caprock, TX) | TX 5A Region 1 Lubbock(TX), 2015-05-02(#2) |
| B-400 | 35 | 49.45 | Mullings, Terrance (2017) (Hillcrest, TX) | AAU JO Region 18 Qualifier(TX), 2015-07-05(#3) |
| B-400 | 37 | 49.47 | Smith, Javian (2016) (Bush, TX) | Rice Victor Lopez Classic(TX), 2015-04-04(#6) |
| B-400 | 38 | 49.57 | Coffey, Noah (2015) (Lovejoy, TX) | TX 5A District 10 Wylie(TX), 2015-04-09(#3) |
| B-400 | 38 | 49.57 | Awosere, Sam (2016) (Heritage, TX) | TAAF Games of Texas(TX), 2015-08-02(#7) |
| B-400 | 40 | 49.59 | Anderson, Barrett (2016) (Royse City, TX) | TAAF Games Region 7 Mesquite(TX), 2015-07-18(#2) |
| B-400 | 41 | 49.69 | Mitchell, Timothy (2015) (Eastside, TX) | TX 5A District 26 Cedar Creek(TX), 2015-04-09(#2) |
| B-400 | 42 | 49.72 | Atkinson, Jordan (2016) (Caprock, TX) | West Texas A&M HS Classic(TX), 2015-03-13(#1) |
| B-400 | 42 | 49.72 | Johnson, Sam (2015) (Hanks, TX) | Amarillo Relays(TX), 2015-03-27(#1) |
| B-400 | 44 | 49.73 | Stewart, Tyrone (2017) (Waco, TX) | TX 5A District 17 Hutto(TX), 2015-04-15(#3) |
| B-400 | 45 | 49.74 | Redden, TK (2015) (Pine Tree, TX) | Hallsville Relays(TX), 2015-03-19(#1) |
| B-400 | 46 | 49.81 | Miller, Emmonie (2016) (Denton, TX) | TX 5A District 5 Ft Worth(TX), 2015-04-15(#2) |
| B-400 | 47 | 49.83 | Welford, Kai (2016) (Ball, TX) | Clear Springs Relays(TX), 2015-04-02(#3) |
| B-400 | 48 | 49.84 | Burrhus, Jack (2015) (Foster, TX) | TX 5A Region 3 Huntsville(TX), 2015-05-02(#6) |
| B-400 | 48 | 49.84 | Gorman, Cory (2016) (George Ranch, TX) | TX 5A Region 3 Huntsville(TX), 2015-05-02(#7) |
| B-400 | 50 | 49.92 | Moos, Cody (2015) (Medina Valley, TX) | TX 5A Area 29-30 Alice(TX), 2015-04-25(#2) |
| B-400 | 51 | 49.96 | Engbrock, Ian (2016) (Lovejoy, TX) | TX 5A District 10 Wylie(TX), 2015-04-09(#4) |
| B-400 | 52 | 49.98 | Walker, Christopher (2015) (Mansfield Summit, TX) | TX 5A District 14 Lancaster(TX), 2015-04-16(#3) |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | See more performances for B-400 | | |
