Over the years, we've missed out on some huge MMA fights because the two athletes involved were signed to different promotions.
Some of the best examples of this involved heavyweight legend Fedor Emelianenko, who fought for PRIDE and Strikeforce, but never made it to the UFC. Had the Russian and the UFC's top heavyweights not been locked up in restrictive contracts that made it possible for them to jump between promotions, we might have seen him battle the likes of Randy Couture, Brock Lesnar, Cain Velasquez and others before he retired.
Instead, we missed out on what would have been some of the biggest heavyweight fights of all time.