If they were better than the white players and available then they would be here and play.
I would say that if more African-American youth embraced baseball, we would have many more on college rosters. I have heard it said by black kids, "baseball is a white sport". Many don't even give it a try.
I actually was thinking about this watching the USA play yesterday. Jimmy Rollins, Brandon Phillips, and Adam Jones all made it in baseball. I wish more youth in the African American community would give it a chance.