RELAY GENIUS National 400 metres champion Javon Francis could miss the 123rd Penn Relays. Francis left last week’s IAAF World Relays with an injury niggle. His absence in the men’s 4×400 metres relay final held Jamaica to third. Checks reveal that Francis has a minor hamstring strain. This niggle may well rule him out of the Jamaica team for the USA versus the World 4x400m event on Saturday at the Penn Relays. Francis, the Jamaica champion in both 2015 and 2016, laboured through his second-leg duties at the World Relays in an unofficial split time of 45.9 seconds. By comparison, his brisk anchor-leg circuit for the Akan Track Club at the Gibson McCook Relays in February was timed in 45.1 seconds. The former Calabar star is a renowned relay genius. In 2013, he produced the fastest high school 4×400 leg – 44.8 – in Penn Relays history. In 2015, at the World Championships, he equalled the quickest 4×400 leg ever by a Jamaican with a run of 43.5 seconds. With him on the sidelines, Peter Matthews, Demish Gaye, Martin Manley and Steven Gayle took the bronze in 3 minutes 02.86 seconds at the World Relays.