That diagram made me giggle. I want to hang it on my refridgerator or something.
I, for one, enjoy OOTP and fantasy baseball quite a bit. I'd posit that many fantasy baseball fans would be more likely to get into an MLB Roster set league than a fictional one, for certain, but there is definitely crossover interest.
Clearly, however, OOTP will never have the simple and easy game experience that fantasy baseball provides.
Other than getting fantasy baseball review/tip sites to start talking about your game, I don't know how to draw in that crowd.