| W | World Outdoor | 43.03 | Wayde van Niekerk | RSA | 8/14/2016 | Rio de Janeiro, BRA |
| A | American Outdoor | 43.18 | Michael Johnson | Nike | 8/26/1999 | Seville, ESP |
| C | College Outdoor | 43.61 | Michael Norman | So. California | 6/8/2018 | Eugene, OR |
| F | Facility | 45.11 | Steven Gardiner | BAH | 2015 | |
| F | Facility | 51.51 | Chandra Cheeseborough | Athletics West | 1984 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 942 | COELHO, JACKSON | SR | COLBY |
47.84 |
| 3 | 773 | TRAVERSO, NOAH | SO | TCNJ |
47.75 |
| 4 | 440 | KITTLE, JACK | SO | WITTENBERG |
47.08 |
| 5 | 412 | ELLIOTT, CAMERON | SR | WITTENBERG |
47.07 |
| 6 | 1370 | DEBELLO, BROCK | FR | WABASH |
47.47 |
| 7 | 2002 | THOMAS , KYRELL | FR | UNATTACHED | 47.80 |
| 8 | 154 | MIGHTEN, RYHEEM | FR | 47.90 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 961 | GRAUBART, SAM | JR | COLBY |
48.62 |
| 3 | 1301 | PRAMOD, ABIRAM | FR | CARSON-NEWMAN |
48.19 |
| 4 | 941 | BIERY, LEVI | SR | COLBY |
48.12 |
| 5 | 1261 | WATSON, EMMETT | FR | CARSON-NEWMAN |
48.04 |
| 6 | 836 | COOPER, BRYCE | SR | WILLIAMS |
48.19 |
| 7 | 2005 | LEWIS, NICKILI | SO | UNATTACHED | 48.50 |
| 8 | 509 | VANDERWOUDE, KOBY | SR | CALVIN |
48.73 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 350 | CAHILL, MADDOX | SR | SOUTHERN MAINE |
49.49 |
| 3 | 1237 | BLAYLOCK, ETHAN | SR | CARSON-NEWMAN |
49.45 |
| 4 | 873 | STONE, COLIN | JR | WILLIAMS |
49.24 |
| 5 | 152 | BROWN, ROMAN | FR | 49.00 | |
| 6 | 796 | AKINBOBOYE, VICTOR | FR | TCNJ |
49.39 |
| 7 | 268 | HAN, JOSHUA | SO | EMORY |
49.47 |
| 8 | 500 | LUBBERTS, CONNOR | SR | CALVIN |
49.59 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 1147 | HEWLING, CAMERON | FR | BERRY |
50.00 |
| 3 | 935 | TALISAYON, JUAN | FR | WILLIAMS |
49.87 |
| 4 | 1411 | GOSS, ZENO | FR | OGLETHORPE |
49.65 |
| 5 | 1109 | POWELL, BERKEY | JR | BERRY |
49.62 |
| 6 | 572 | HABERS, BEN | SO | CALVIN |
49.78 |
| 7 | 1419 | LAUDAT, PHILMON | FR | OGLETHORPE |
49.99 |
| 8 | 438 | SEYE, DASHAWN | SO | WITTENBERG |
50.20 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 498 | ANDRINGA, DANNY | SR | CALVIN |
50.60 |
| 3 | 960 | GRAUBART, MARK | JR | COLBY |
50.37 |
| 4 | 1985 | KELLY, JONATHAN | SR | UNATTACHED | 50.22 |
| 5 | 1457 | SANDERS, ETHAN | SO | COLUMBUS ST. |
50.21 |
| 6 | 805 | MUSE, ISAIAH | JR | TCNJ |
50.25 |
| 7 | 872 | SHEPARD, ASA | JR | WILLIAMS |
50.50 |
| 8 | 1343 | SMITH, OWEN | SR | WABASH |
50.80 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 2 | 1840 | JONES, DENIM | JR | COLUMBIA INT'L |
51.12 |
| 3 | 471 | ALLEN, XAVIER | FR | WITTENBERG |
50.96 |
| 4 | 1120 | DUTCHER, CORBIN | SO | BERRY |
50.89 |
| 5 | 869 | CORRIELUS, NATHAN | JR | WILLIAMS |
50.84 |
| 6 | 1142 | BOUDREAUX, TOMMY | FR | BERRY |
50.94 |
| 7 | 908 | STEGMEIER, NOAH | SO | WILLIAMS |
51.00 |
| 8 | 308 | MILLER, MICHAEL | FR | EMORY |
51.21 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 1 | 1452 | BROWN JR., ANTHONY | JR | COLUMBUS ST. |
51.72 |
| 2 | 970 | DERBY, REEVE | SO | COLBY |
51.59 |
| 3 | 300 | WACHTER, RYAN | FR | EMORY |
51.38 |
| 4 | 465 | TILIEN, JHOODLEY | FR | WITTENBERG |
51.23 |
| 5 | 427 | BIER, OWEN | JR | WITTENBERG |
51.22 |
| 6 | 929 | BACHULIS, LEO | FR | WILLIAMS |
51.24 |
| 7 | 1001 | SULLIVAN, LOGAN | FR | COLBY |
51.46 |
| 8 | 809 | TANTRY, NIHAR | FR | TCNJ |
51.65 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 1 | 1145 | KIRKPATRICK, BRAYLON | FR | BERRY |
53.00 |
| 2 | 1441 | BROOKS, KENNETH | SR | COLUMBUS ST. |
52.50 |
| 3 | 1769 | HUNTER, AJ | FR | TENNESSEE WESLEYAN |
52.37 |
| 4 | 1730 | HAYDEN, MARK | FR | EMMANUEL (GA.) |
52.04 |
| 5 | 1850 | ZAGATA, MARK | FR | COLUMBIA INT'L |
51.77 |
| 6 | 1352 | CLARK, MORGYN | SO | WABASH |
52.09 |
| 7 | 1381 | THOMPSON, BEN | FR | WABASH |
52.37 |
| 8 | 1958 | WATSON, JOSHUA | FR | MARION MILITARY INSTITUTE | 52.69 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 1 | 1655 | CROW, TYLER | SR | TRUETT-MCCONNELL |
56.93 |
| 2 | 1420 | LARGE, BRANDON | FR | OGLETHORPE |
55.08 |
| 3 | 1353 | HUISDEN, JOHN | SO | WABASH |
54.66 |
| 4 | 1916 | FRISON, STACY | FR | YOUNG HARRIS | 53.21 |
| 5 | 1141 | CASALETTA-HOLMES, LUCAS | FR | BERRY |
53.02 |
| 6 | 1771 | FRIERSON, KAMAURIAN | FR | TENNESSEE WESLEYAN |
53.54 |
| 7 | 1971 | NOSA-OVIASU, JESSE | SPEED FORCE ATHLETICS | 55.00 | |
| 8 | 936 | MEITE, HANS | FR | WILLIAMS |
56.08 |
| Lane | # | Athlete | Yr. | Team | Seed |
|---|---|---|---|---|---|
| 1 | 1973 | VICTOR, OLIVIER | SPEED FORCE ATHLETICS | NT | |
| 2 | 1964 | POSEY, WILL | FR | MARION MILITARY INSTITUTE | NT |
| 3 | 1760 | BUCHANAN, KT | SO | TENNESSEE WESLEYAN |
NT |
| 4 | 1473 | GARDNER, ZACKERY | SO | COLUMBUS ST. |
1:01.13 |
| 5 | 1963 | SMITH, TYRESE | FR | MARION MILITARY INSTITUTE | 58.54 |
| 6 | 1725 | ALLEGOOD, EVERETT | FR | EMMANUEL (GA.) |
NT |
| 7 | 1775 | FANEYTE, SAVIR | FR | TENNESSEE WESLEYAN |
NT |
| 8 | 1376 | SAIDIAN, ALEC | FR | WABASH |
NT |