Remember Brock's first fight wasn't supposed to be Min Son Kim, it was Hong Man Choi but the Choi had to have surgery and it was scrapped. This may have changed history. HMC was in his prime then, slow but a good kickboxer. More importantly he was a lot bigger than Brock and bullying him with weight and strength would not have been possible. After a freak run, it was later exposed that besides good wrestling and strength Brock had little to offer in MMA and a flinch reflex which could not be helped. I think he would have lost to HMC and then continued on the amateur circuit for a while.