Katrina Seymour
Giải đấu quốc tế

| Năm> Representing the  Bahamas | Giải đấu> Representing the  Bahamas | Địa điểm> Representing the  Bahamas | Thứ hạng> Representing the  Bahamas | Nội dung> Representing the  Bahamas | Chú thích> Representing the  Bahamas |
| --- | --- | --- | --- | --- | --- |
| 2009 | CARIFTA Games (U17) | Vieux Fort, Saint Lucia | 3rd (h) | 400 m | 56.031 |
| 2009 | CARIFTA Games (U17) | Vieux Fort, Saint Lucia | 2nd | 4 × 400 m relay | 3:45.61 |
| 2009 | World Youth Championships | Brixen, Italy | 14th (sf) | 400 m | 56.24 |
| 2009 | World Youth Championships | Brixen, Italy | 4th | Medley relay | 2:09.33 |
| 2009 | Pan American Junior Championships | Port of Spain, Trinidad and Tobago | – | 400 m | DNF |
| 2009 | Pan American Junior Championships | Port of Spain, Trinidad and Tobago | 3rd | 4 × 400 m relay | 3:42.17 |
| 2009 | World Championships | Berlin, Germany | – | 4 × 400 m relay | DQ |
| 2010 | CARIFTA Games (U20) | George Town, Cayman Islands | – | 4 × 400 m relay | DQ |
| 2010 | Central American and CaribbeanJunior Championships (U20) | Santo Domingo, Dominican Republic | 2nd | 4 × 100 m relay | 45.54 |
| 2010 | Central American and CaribbeanJunior Championships (U20) | Santo Domingo, Dominican Republic | 3rd | 4 × 400 m relay | 3:38.81 |
| 2010 | World Junior Championships | Moncton, Canada | 4th | 4 × 400 m relay | 3:33.43 |
| 2011 | CARIFTA Games (U20) | Montego Bay, Jamaica | 2nd | 400 m hurdles | 58.04 |
| 2011 | CARIFTA Games (U20) | Montego Bay, Jamaica | 3rd | 4 × 400 m relay | 3:41.05 |
| 2011 | Central American and Caribbean Championships | Mayagüez, Puerto Rico | 3rd | 400 m hurdles | 57.24 |
| 2011 | Pan American Junior Championships | Miramar, United States | 1st | 400 m hurdles | 57.87 |
| 2011 | Pan American Junior Championships | Miramar, United States | 3rd | 4 × 400 m relay | 3:42.61 |
| 2011 | Pan American Games | Guadalajara, Mexico | 10th (h) | 400 m hurdles | 60.34 |
| 2012 | CARIFTA Games (U20) | Hamilton, Bermuda | 4th | 400 m hurdles | 60.70 |
| 2012 | CARIFTA Games (U20) | Hamilton, Bermuda | 2nd | 4 × 400 m relay | 3:40.44 |
| 2014 | Commonwealth Games | Glasgow, United Kingdom | 19th (h) | 400 m hurdles | 61.34 |
| 2014 | Commonwealth Games | Glasgow, United Kingdom | 6th | 4 × 100 m relay | 44.25 |
| 2014 | NACAC U23 Championships | Kamloops, Canada | – | 400 m hurdles | DNF |
| 2014 | Central American and Caribbean Games | Xalapa, Mexico | 9th (h) | 400 m hurdles | 59.89 |
| 2015 | IAAF World Relays | Nassau, Bahamas | 3rd (B) | 4 × 400 m relay | 3:35.01 |
| 2015 | Pan American Games | Toronto, Canada | 5th | 4 × 400 m relay | 3:31.60 |
| 2015 | NACAC Championships | San José, Costa Rica | 11th (h) | 400 m hurdles | 58.47 |
| 2015 | NACAC Championships | San José, Costa Rica | 3rd | 4 × 400 m relay | 3:31.80 |
| 2015 | World Championships | Beijing, China | 10th (h) | 4 × 400 m relay | 3:28.46 |
| 2018 | Commonwealth Games | Gold Coast, Australia | 9th (h) | 400 m hurdles | 55.69 |
| 2018 | Central American and Caribbean Games | Barranquilla, Colombia | 11th (h) | 400 m hurdles | 58.37 |
| 2018 | NACAC Championships | Toronto, Canada | 9th (h) | 400 m hurdles | 57.79 |
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