Iglehart-Summers ran at the 2008 United States Olympic Trials, reaching the semi-finals. He also made another international appearance at the 2008 NACAC Under-23 Championships, though the American relay team he anchored managed only fifth. He returned to national competition at the 2009 USA Outdoor Track and Field Championships, but failed to progress beyond the heats. Following appearances at the 2010 national indoor and outdoor championships, he competed sparingly in 2011 before achieving his best national placing at the 2012 USA Indoor Track and Field Championships, finishing seventh in the 400 m final. This earned him his first and only senior national selection and he came away with a gold medal from the 2012 IAAF World Indoor Championships after running in the heats only of the men's 4 × 400 metres relay. He competed in mostly Texan meets before retiring two years later, with his final national appearance coming at the 2014 USA Indoor Track and Field Championships, where he placed eighth in the 400 m.