Personal Bests| Event | Result | Wind | Venue | Date |
|---|
| 60m ind. | 6.66 | | Fayetteville, AR (USA) | 11.02.2012 | | 100m | 9.96 | 0.0 | Shanghai (CHN) | 28.09.2007 | | 200m | 19.65 | 0.0 | Daegu (KOR) | 28.09.2006 | | 200m ind. | 20.10 | | Fayetteville, AR (USA) | 12.03.2005 | | 300m | 32.14 | | Eugene, OR (USA) | 07.06.2009 | | 300m ind. | 31.88 | | Fayetteville, AR (USA) | 10.02.2006 | | 400m | 45.22 | | Stade de France, Paris-St-Denis (FRA) | 08.07.2006 | | 400m ind. | 46.16 | | Fayetteville, AR (USA) | 14.01.2005 | | 4x100m | 37.45 | | Letzigrund, Zürich (SUI) | 19.08.2010 | | 4x200m | 1:20.64 | | Philadelphia, PA (USA) | 25.04.2015 | | 4x400m | 2:59.71 | | Philadelphia, PA (USA) | 26.04.2008 | | 4x400m ind. | 3:01.96 | | Fayetteville, AR (USA) | 11.02.2006 |
| Season's BestsNo season's bests available. |
World RankingsNot ranked currently. | | Year | Result | Wind | Venue | Date |
|---|
| 2004 | 10.38 | +1.2 | Oxford (GBR) | 15.05.2004 | | 2005 | 10.35 | +1.7 | Nashville, TN (USA) | 15.05.2005 | | 2006 | 10.11 | +0.4 | Shanghai (CHN) | 23.09.2006 | | 2007 | 9.96 | 0.0 | Shanghai (CHN) | 28.09.2007 | | 2008 | 10.07 | +1.6 | Eugene, OR (USA) | 28.06.2008 | | 2009 | 10.18 | +0.4 | Letzigrund, Zürich (SUI) | 28.08.2009 | | 2010 | 10.15 | +0.9 | Nuoro (ITA) | 14.07.2010 | | 2012 | 10.27 | +0.7 | Olympiastadion, Stockholm (SWE) | 17.08.2012 | | 2013 | 10.29 | +1.6 | Albert Park, Melbourne (AUS) | 06.04.2013 | | 2014 | 10.50 | -0.9 | Fayetteville, AR (USA) | 05.04.2014 | | 2015 | 10.47 | +0.3 | Victoria (CAN) | 10.06.2015 | | 2016 | 10.18 | +2.0 | Fayetteville, AR (USA) | 23.04.2016 | | 2017 | 10.71 | -2.9 | Hamilton (BER) | 01.07.2017 |
| Year | Result | Wind | Venue | Date |
|---|
| 2004 | 20.25 | +0.7 | Sacramento, CA (USA) | 16.07.2004 | | 2005 | 19.89 | +1.8 | Crystal Palace, London (GBR) | 22.07.2005 | | 2006 | 19.65 | 0.0 | Daegu (KOR) | 28.09.2006 | | 2007 | 19.82 | +1.3 | Icahn Stadium, New York, NY (USA) | 02.06.2007 | | 2008 | 19.90 | +1.7 | Eugene, OR (USA) | 06.07.2008 | | 2009 | 19.85 | -0.3 | Olympiastadion, Berlin (GER) | 20.08.2009 | | 2010 | 19.79 | +0.4 | Letzigrund, Zürich (SUI) | 19.08.2010 | | 2011 | 20.18 | +1.6 | National Stadium, Kingston (JAM) | 07.05.2011 | | 2012 | 19.90 | +0.4 | Olympic Stadium, London (GBR) | 09.08.2012 | | 2013 | 20.10 | +1.6 | Drake Stadium, Des Moines, IA (USA) | 23.06.2013 | | 2014 | 20.19 | -0.2 | Icahn Stadium, New York, NY (USA) | 14.06.2014 | | 2015 | 20.03 | +2.0 | CIBC, Toronto (CAN) | 23.07.2015 | | 2016 | 20.31 | +0.3 | Houston, TX (USA) | 23.07.2016 | | 2017 | 20.60 | -1.0 | St. George's (GRN) | 08.04.2017 | | 2018 | 20.64 | +0.3 | Gainesville, FL (USA) | 13.04.2018 | | 2019 | 20.88 | +2.0 | Fayetteville, AR (USA) | 03.05.2019 |
No progression. No progression. | Year | Result | Venue | Date |
|---|
| 2009 | 32.14 | Eugene, OR (USA) | 07.06.2009 |
| Year | Result | Venue | Date |
|---|
| 2006 | 45.22 | Stade de France, Paris-St-Denis (FRA) | 08.07.2006 | | 2007 | 46.63 | Fayetteville, AR (USA) | 04.05.2007 | | 2009 | 47.33 | Austin, TX (USA) | 02.05.2009 | | 2010 | 46.76 | Waco, TX (USA) | 17.04.2010 | | 2011 | 48.25 | Waco, TX (USA) | 23.04.2011 | | 2017 | 48.61 | Fayetteville, AR (USA) | 22.04.2017 |
| Year | Result | Venue | Date |
|---|
| 2005 | 38.49 | Sacramento, CA (USA) | 10.06.2005 | | 2006 | 37.59 | Olympic Stadium, Athina (GRE) | 16.09.2006 | | 2007 | 37.78 | Yanmar Stadium Nagai, Osaka (JPN) | 01.09.2007 | | 2008 | 37.99 | Stockholm (SWE) | 22.07.2008 | | 2009 | 37.73 | Letzigrund, Zürich (SUI) | 28.08.2009 | | 2010 | 37.45 | Letzigrund, Zürich (SUI) | 19.08.2010 | | 2011 | 38.41 | Austin, TX (USA) | 09.04.2011 | | 2012 | 38.59 | Mestský Stadion, Ostrava (CZE) | 25.05.2012 | | 2013 | 38.36 | Austin, TX (USA) | 30.03.2013 | | 2014 | 38.57 | Austin, TX (USA) | 29.03.2014 | | 2015 | 38.27 | CIBC, Toronto (CAN) | 25.07.2015 | | 2016 | 39.02 | Philadelphia, PA (USA) | 30.04.2016 | | 2017 | 38.17 | Austin, TX (USA) | 01.04.2017 | | 2018 | 38.96 | Gainesville, FL (USA) | 31.03.2018 | | 2019 | 38.88 | Columbia, SC (USA) | 13.04.2019 |
| Year | Result | Venue | Date |
|---|
| 2005 | 1:22.33 | Philadelphia, PA (USA) | 29.04.2005 | | 2008 | 1:22.03 | Lawrence, KS (USA) | 19.04.2008 | | 2014 | 1:21.35 | T. Robinson Stadium, Nassau (BAH) | 24.05.2014 | | 2015 | 1:20.64 | Philadelphia, PA (USA) | 25.04.2015 | | 2016 | 1:20.94 | Philadelphia, PA (USA) | 30.04.2016 | | 2017 | 1:20.87 | Austin, TX (USA) | 01.04.2017 | | 2018 | 1:23.46 | Prairie View, TX (USA) | 24.03.2018 |
| Year | Result | Venue | Date |
|---|
| 2006 | 2:59.86 | Austin, TX (USA) | 08.04.2006 | | 2007 | 3:00.04 | Philadelphia, PA (USA) | 28.04.2007 | | 2008 | 2:59.71 | Philadelphia, PA (USA) | 26.04.2008 | | 2009 | 3:00.58 | Philadelphia, PA (USA) | 25.04.2009 | | 2019 | 3:02.58 | Columbia, SC (USA) | 13.04.2019 |
| Year | Result | Venue | Date |
|---|
| 2017 | 3:11.45 | Philadelphia, PA (USA) | 29.04.2017 |
|
