Mixed martial arts: UFC, Bellator and PFL
Sources and coverage
Where the bouts come from, and what we know we have not read.
The data
Wikipedia, read through the MediaWiki API.
Each page carries a revision number: it is what says whether an edition changed since the last read, hence what has to be reread. 1,207 editions are tracked.
These three dates are never conflated: a source checked ten minutes ago may have published nothing for weeks.
The scope
The events behind it
What feeds this ranking, and how much of each is actually in it. The count is on the bouts stored, not on what we look for: tracking a competition does not mean the source has published its editions.
3 events, 11,864 bouts.
What we know we have not read
Gaps come from what the source does not publish: of a large draw, it does not always detail every preliminary round. They are not guessed: in a knockout tournament, every entrant but the winner loses exactly once, and an unbeaten fighter who did not win the tournament signals a missing bout. An edition published in part is a third thing again, and the one nothing here can close: the source carries the closing rounds and has never written down the ones before them. Those editions were read to their last published match. They are counted apart because the figure above measures what is left for us to read, and this is not that.