TOKYO — Mondo Duplantis was a high school freshman when his life changed. A pole-vaulting prodigy from Lafayette, La., Duplantis was a couple of months from his first international competition, the 2015 world youth championships, when he received a
TOKYO — Mondo Duplantis was a high school freshman when his life changed. A pole-vaulting prodigy from Lafayette, La., Duplantis was a couple of months from his first international competition, the 2015 world youth championships, when he received a