| Year |
Result |
Place |
Venue |
Date |
| 2003 |
50.66 |
11 |
Sacramento |
Jun 14 |
| 2004 |
50.00 |
8 |
Athens |
Aug 24 |
| 2005 |
49.88 |
5 |
Carson, CA |
Jun 25 |
| 2006 |
49.80 |
5 |
Shanghai |
Sep 23 |
| 2007 |
49.64 |
3 |
Indianapolis, IN |
Jun 23 |
| 2008 |
50.88 |
23 |
Eugene, OR |
Jul 03 |
| 2012 |
49.72 |
7 |
London |
Aug 05 |
| 2014 |
50.98 |
17 |
Sacramento, CA |
Jun 27 |
|
| International |
| Year |
Result |
Place |
| 2004 (Olympic) |
50.00 |
5 |
| 2005 (World) |
51.14 |
5 |
| 2007 (World) |
50.17 |
5 |
| 2012 (Olympic) |
49.72 |
3 |
| National |
| Year |
Result |
Place |
| 2003 (USA Champ.) |
51.78 |
3 |
| 2004 (OT & USA Champ.) |
50.28 |
3 |
| 2005 (USA Champ.) |
49.88 |
2 |
| 2006 (USA Champ.) |
50.40 |
2 |
| 2007 (USA Champ.) |
49.64 |
1 |
| 2008 (OT & USA Champ.) |
50.88 |
3 |
| 2011 (USA Champ.) |
51.17 |
6 |
| 2012 (OT & USA Champ.) |
50.02 |
2 |
| 2014 (USA Champ.) |
51.04 |
5 |
|
|