| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 47.70 | Pratt, Darnell (2017) (Mount Hebron, MD) (US#68) | NB Outdoor Nationals(NC), 2015-06-21(#7) |
| B-400 | 2 | 47.84 | Gomez, Rico (2015) (Frederick Douglass, MD) (US#89) | MD 2A South Regional(MD), 2015-05-16(#1) |
| | | National Elites above. State Elites below | | |
| B-400 | 3 | 48.25 | Coleman, Antonio (2015) (Bowie, MD) | McNamara Mustang Invitational(MD), 2015-04-18(#2) |
| B-400 | 3 | 48.25 | Chigbue, Kenneth (2015) (DeMatha Catholic, MD) | USATF Junior Olympics National Championships 17-18(FL), 2015-08-02(#3) |
| B-400 | 5 | 48.43 | Robinson, Aaron (2017) (Oxon Hill, MD) | TC Williams Invitational(VA), 2015-05-02(#1) |
| B-400 | 6 | 48.75 | Rollins, Michael (2015) (North Point, MD) | MD 4A East Regional(MD), 2015-05-16(#1) |
| B-400 | 7 | 48.83 | Sorra, Justin (2015) (Quince Orchard, MD) | Montgomery County Championships(MD), 2015-05-06(#1) |
| B-400 | 8 | 48.95 | Walker, Jalen (2015) (Northwest, MD) | Art Madric Hall of Fame Invitational(DE), 2015-04-18(#1) |
| B-400 | 9 | 49.05 | Alcorn, Thomas (2017) (Westlake, MD) | MD 3A South Regional(MD), 2015-05-16(#1) |
| B-400 | 10 | 49.11 | Rowe, Kenny (2016) (Loyola Blakefield, MD) | North County Knights Invitational(MD), 2015-04-17(#1) |
| B-400 | 11 | 49.22 | Christian, Juston (2015) (Owings Mills, MD) | MD 2A North Regional(MD), 2015-05-16(#1) |
| B-400 | 12 | 49.45 | Akil, Isaiah (2015) (Riverdale Baptist, MD) | Riverside Baptist Invitational(MD), 2015-04-18(#2) |
| B-400 | 13 | 49.57 | George, Jonathan (2016) (Bowie, MD) | MD 4A South Regional(MD), 2015-05-16(#3) |
| B-400 | 14 | 49.59 | Young, Tory (2017) (Gilman, MD) | MIAA/IAAM Championships(MD), 2015-05-05(#2) |
| B-400 | 14 | 49.59 | Lewis, Dorrien (2016) (La Plata, MD) | MD 3A South Regional(MD), 2015-05-16(#2) |
| B-400 | 16 | 49.66 | Burgess, Cameron (2016) (Charles Herbert Flowers, MD) | MD 4A South Regional(MD), 2015-05-16(#4) |
| B-400 | 17 | 49.68 | Williams, Kyle (2015) (Henry E. Lackey, MD) | AAU National Club Championships(FL), 2015-07-18(#8) |
| B-400 | 18 | 49.70 | Carrington, Dillon (2015) (Atholton, MD) | MD 3A State Meet(MD), 2015-05-23(#3) |
| B-400 | 19 | 49.75 | Scott, Nighel (2015) (McDonogh, MD) | MIAA/IAAM Championships(MD), 2015-05-05(#3) |
| B-400 | 20 | 49.76 | Cody, Jamal (2015) (Hereford, MD) | MD 2A North Regional(MD), 2015-05-16(#2) |
| B-400 | 21 | 49.80 | Humm, Andrew (2015) (Mount Hebron, MD) | Howard County Championships(MD), 2015-05-05(#2) |
| B-400 | 22 | 49.82 | Settles, Rufus (2015) (Sherwood, MD) | Montgomery County Championships(MD), 2015-05-06(#3) |
| B-400 | 23 | 49.85 | Gilchrist, Tajh (2016) (Bowie, MD) | USATF JO Region 3 Qualifier(VA), 2015-07-12(#2) |
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| | | See more performances for B-400 | | |
