There were a lot of fixed fights in PRIDE, and many fighters/back stage people openly admit it, including Coleman, Bas, there's another guy too but I can't remember.
Honestly I don't 100% count out some UFC fights being fixed, not neccessarily by Dana but by the fighters/managers. I don't have any examples, just saying I don't completely rule it out, this is a sport that's all about the $$$ after all.
“Anna, my strong, terrifying Anna.” -Cas
"You lack the requisite spine and testicular fortitude to study under me" -Elodin