| W | World | 40.82 | Bartoletta, Felix, Knight, Jeter | USA | 8/11/2012 | London, ENG |
| A | American | 40.82 | Bartoletta, Felix, Knight, Jeter | USA national team | 8/10/2012 | London, ENG |
| C | College Outdoor | 42.36 | Carter, Lucas, Duncan, Mayo | Texas A&M | 6/12/2009 | Fayetteville, AR |
| PL | JD | Team | Squad | Time | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Pts | HPL | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Oxford (MS) | A | 50.61 |
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10 | 1 (1) | |||||
| 2 | Senatobia | A | 50.92 |
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8 | 1 (2) | |||||
| 3 | Desoto Central | A | 50.98 |
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6 | 1 (3) | |||||
| 4 | Independence | A | 51.88 |
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5 | 2 (1) | |||||
| 5 | Lake Cormorant | A | 52.62 |
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4 | 1 (4) | |||||
| 6 | Amory | A | 54.31 |
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3 | 1 (5) | |||||
| 7 | Simmons | A | 55.13 |
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2 | 2 (2) | |||||
| 8 | W. Tallahatchie | A | 55.15 |
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1 | 2 (3) | |||||
| 9 | Corinth | A | 58.02 |
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1 (6) | ||||||
| Olive Branch | A | DQ |
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| West Memphis | A | DNS |
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| Desoto Central | B | DNS | ||||||||||||
| W. Tallahatchie | B | DNS |
| HPL | JD | Team | Squad | Time | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Pts | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | OXFORD (MS) | A | 50.61 |
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10 | |||||
| 2 | SENATOBIA | A | 50.92 |
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8 | |||||
| 3 | DESOTO CENTRAL | A | 50.98 |
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6 | |||||
| 4 | LAKE CORMORANT | A | 52.62 |
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4 | |||||
| 5 | AMORY | A | 54.31 |
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3 | |||||
| 6 | CORINTH | A | 58.02 |
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| OLIVE BRANCH | A | DQ |
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| HPL | JD | Team | Squad | Time | Athlete 1 | Athlete 2 | Athlete 3 | Athlete 4 | Pts | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | INDEPENDENCE | A | 51.88 |
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5 | |||||
| 2 | SIMMONS | A | 55.13 |
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2 | |||||
| 3 | W. TALLAHATCHIE | A | 55.15 |
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1 | |||||
| WEST MEMPHIS | A | DNS |
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| DESOTO CENTRAL | B | DNS | |||||||||||
| W. TALLAHATCHIE | B | DNS |