First thing to notice: only 3 seniors (and looking at bios, it would appear 2 still have eligibility - don't know if we give 5th years in baseball - but no grad students listed currently)
Quick look at ND roster:
New Jersey 6, Illinois 6, Florida 4, California 4, Missouri 3, Ohio 2, Iowa 1, Washington 1, Indiana 1, Oregon 1, Michigan 1, Georgia 1, Colorado 1, New York 1, Texas 1, Kentucky 1, Massachusetts 1
Other than Illinois, not much of a Midwest recruiting base
And from school names or those I recognize, looks like 14 out of 36 from Catholic HS (could be more)