#4 Dominick Cruz vs. Urijah Faber
The Cruz - Faber saga may perhaps be the bitterest case of bad blood in MMA history. For years and years, these two men (inside the UFC and even in the WEC where the rivalry began) have sustained major hate for one another.
It all began in 2007 when Faber was slotted to fight Cruz for the WEC featherweight title, which the latter eventually lost due to a submission victory via guillotine choke.
Ahead of the fight, Cruz (the champion at the time) did not take too kindly to the California Kid being on the poster ahead of himself, so Cruz took it upon himself to sign his signature above his opponents face. Thus began the 10-year long rivalry.
The two men bickered back and forth for years between all three of their fights and the rivalry was filled to the brim with bad blood. However, after Faber’s retirement bout against Brad Pickett in December 2016, the two men finally put to rest their battles and paid respect to each other’s MMA careers.