KINGSTON, Jamaica – Excelsior High’s Jaeden Campbell ran a meet record and personal best 50.87 seconds to win the boys Class 2 400m hurdles on Friday at the ISSA/GraceKennedy Boys and Girls Athletics Championships at the National Stadium. Campbell broke the previous meet record 51.44 seconds set in 2017 by Jeremy Farr of Wolmer’s Boys, and broke his previous lifetime best of 50.91 seconds while extending his world under-18 lead...