Yusuf Saad Kamel, born Gregory Konchellah is a male former middle-distance runner who competed in the 800 metres and 1500 metres. Born in Narok, Kenya – the son of former two-time 800 metres World Champion Billy Konchellah – he represented Bahrain internationally. Kamel won the gold in the 1500 m and bronze in 800 m at the 2009 World Championships in Athletics held in Berlin.