Zuffa instituted more rules and safety measures .
The Ultimate Fighting Championship organization was formed in the 1990s , then bought by Zuffa , LLC in 2001 , which sought to gain the sport a legitimacy similar to boxing .
Zuffa , LLC instituted more rules and safety measures .
The Ultimate Fighting Championship organization was formed in the 1990s , then bought by Zuffa , LLC in 2001 , which sought to gain the sport a legitimacy similar to boxing .