The shoe excuse for the first fight with Gracie is bs, it seems to be a new excuse that he just came up with in recent years, I firmly believe that Royce was just a better fighter.
The third fight though was bullshit. The referee screwed Ken and all the fans that paid to see that fight, Ken should have been given a recovery period and the fight should have been restarted. The ref was like a deer in the headlights, he was lost like he didn't know what to do so he just decided to call the fight off. Both guys were in good shape and probably would have been a great fight that surprised a lot of people, shitty ass amateur referee's shouldn't be allowed to work main event pro fights.
With that said though it seemed like Ken could have tried to fight through it, I think he was just looking for a way out so he was kind of overselling it(hoping for a DQ win or a no contest). The referee didn't see what happened and thought Ken broke his arm or something the way Ken sold it(I was there live and it initially looked like he was clutching his arm after those knees). I just don't understand why once the ref seen the replay they didn't just go with the standard protocol for groin shot, instead it was like he just said fuck it, that's a wrap folks, lets go home.