I think the whole structure of minor league baseball as a feeder system is prohibative to it. Plus possiably they're scared that people will stop showing up to 'Division AA' baseball when it's not about the hot young prospect skyrocketing into the major and instead the chance to move up into 'Division AAA.' Promotion and relegation could also work really easily and well in NASCAR. I don't know much about the sport but doesn't it already kind of exist. Nextel Cup guys will race in the Busch Series, and the better Busch Series guys work their way up? Though I'm not sure the worst Nextel Cup point guys get 'relegated.' Anyone know what happens there?