Apparently JIMMY is a knuckleball pitcher. Those aren't a real high commodity in the Big Leagues. Sure, if you're REALLY good at throwing a knuckleball, you can make a good living in the Big Leagues like Tim Wakefield or Phil Niekro, but it's a really hard pitch to master and control, and even the guys that are good, if their knuckleball is fluttering, they're gonna get hit. Conversely, if they're really on, they could pitch a no-hitter. I know that's true of just about anyone, but a more conventional style of pitching is going to be a little more consistent than a knuckleball pitcher.
I think that explains why he has dominating performances as documented and yet his ERA is in the 6's.
But there's also an old saying in baseball- if you're good, they'll (the scouts) find you. Heck, Ricky Bowen got drafted after he fell on his face. Ole Miss had a guy Chris Corrigan get drafted and he had numbers about as bad or worse than JIMMY. I think the difference between the three is the fact that Jimmy has a novelty pitch, but isn't consistently dominating with it, vs the others who are more conventional, and likely will be more easily "coached up".
Or, some teams probably saw the website and just don't want to deal with the family.
If I were them, I would have JIMMY try out for some Indy league teams or try to see if a big league team will sign him as a FA.