Jose Ramirez Vs. Josh Taylor predictions, cards, odds, expert options, start time, stream, how to watch Regardless of the year you think the era of the professional four-belt boxing tournament began, the undisputed champions of a certain weight class have become a rare phenomenon within the sport. For clarity, the WBO was not launched until 1988, but it was not widely accepted until 2004 at the same level as the WBC, WBA, and IBF sanctioning organizations, although this footnote has also been debated among historians. In any case, the modern era of boxing in the last two decades has produced only four men and three women to receive four titles from around the world at the same time to gain the same weight.