Juan Diaz: Boxer With Schoolwork, Curfew and World Title.
Inside the ring, Juan Diaz is poised and polished. Just 21, he owns the WBA lightweight title, boxing’s youngest reigning world champion. But at his parent’s tidy brick home in Houston, Diaz remains a university student with a 10 p.m. curfew on school nights. “He’s a big baby,” teases younger brother Jose. “Mom still has…
