Prince Mumba was the oldest man to compete in the athletics for Zambia at age 27. He had previously competed at the 2004 Summer Olympics in Athens, Greece. Mumba qualified for the London Games, as his personal best time of one minute and 46.14 seconds met the "B" standard for the men's 800 metres . Mumba said his aim was to reach the finals of the 800 metres and that he believed and had faith in himself. He competed in the first round of the men's 800 metres on 6 August and was drawn in the sixth heat. Mumba finished seventh with a time of 1 minute, 49.07 seconds. Mumba finished 42nd out of 52 athletes overall, and was 1.63 seconds behind the slowest competitor who progressed into the first round and was eliminated from the competition. After his elimination Mumba revealed that he been experiencing chest pain and coughing but did not report it as he felt his condition would improve. He stated that another factor was himself going beyond his capabilities and how quickly the event started.