Fighter Stats: Not Tougha at Zuffa

Today, I decided to take a look at fighters who have the largest difference between their Zuffa and non-Zuffa win percentage. �The following qualifiers were used:

WEC, UFC, and PRIDE are considered as “Zuffa”.
Fighters must have had at least three fights in those three organizations.
Fighters must have had at least three fights outside of those three [...]

Source: http://www.fightmatrix.com/2010/11/24/fighter-stats-not-tougha-at-zuffa/

Muhammed Ali Evander Holyfield Mike Tyson Kimbo Slice