USA Championships

  • Two-time USA Outdoor champion – 2005 (47.24); 2006 (47.39)
  • 2008 Olympic Trials runner-up (48.36)
  • 3rd in 400m at 2009 USA Outdoors (45.14)
  • Third at 2012 Olympic Trials (48.89)
  • 1st at 2016 Olympic Trials (48.50)

International Championships

  • Two-time World Outdoor champion – 2007 (47.61); 2009 (47.91)
  • 2008 Olympic Games silver medalist (47.98)
  • Two-time World Outdoor Championships 4x400m gold medalist – 2007, 2009
  • 2008 Olympic Games 4x400m gold medalist
  • 2016 Olympic Champion 400IH (47.74)

Collegiate Championships

  • Two-time NCAA Outdoor champion – 2004 (49.05); 2005 (47.56)
  • 2005 NCAA Indoor 400m champion (44.57 WR)

Awards and Honors

  • World indoor 400m record holder (44.57)
  • World indoor 4x400m record holder (3:01.96)
  • 2016 Diamond League Winner 400IH
  • Two-time Outdoor Visa champion – 2005, 2006
  • 2004 World Junior Championships gold medalist 400m hurdles (48.51) and 4x400m (3:01.09)
  • Six-time NCAA Division I All-American