He has fought as a lightweight, featherweight and bantamweight.
Before 1909, anyone below featherweight was considered a bantamweight, regardless of how small the boxer.
Bantamweight was the lightest category, including wrestlers weighing up to 56 kilograms.
Dvila, nearly 34 at the time, was the oldest bantamweight championship participant.
The bantamweight division is for fighters weighing between 112 and 118 lb.
Caldwell was considered a supreme fighter whose class and skill saw him claim a medal in 1956 and the world bantamweight crown in 1961.
He became an amateur boxer (bantamweight) and footlball player.
Mixed martial arts tournaments were held in multiple weight classes, including the bantamweight division, heavyweight division and women's division at 115 pounds.
