I think MMA organizations should allow any realistic prospects to try out MMA. I think MMA is still in its infancy and these types of fights will allow the people to gauge how tough MMA fighters really are against guys that are or were once professional athletes in other sports. This will either embarrass MMA if James Toney steps in the ring with a guy like Brock and immediately KOs him. Or it will legitimize it if Brock can destroy this guy. Long term wise, these kind of fights will just make MMA better. Just don't sign Canseco because that guy is just a circus act.