 Benjamin competed at the 2007 World Championships in Osaka, but failed to make the final, recording 46.17 s in the semis.Benjamin suffered a number of injuries and decided to bring an end to his athletics career in mid-2009.Citing his disappointment in missing the 2008 Beijing Olympics, he said that "taking an individual or relay spot in the Berlin World Championships from an aspiring 2012 Olympian would be disingenuous and unfair".