Rules vary a little... so it would be best to check each.
For NCAA Schools: http://www.ncaa.org/student-at...urrent/want-transfer
NAIA: https://www.ncsasports.org/nai...enter/transfer-rules
NJCAA: http://njcaa.org/eligibility/eligibility_rules
RE: "rare" to attend sme school for 4 yrs...NO!
That's why it's so very important to do your homework...Fit, academics, social, financial...ie: Would i attend this college, if baseball were not part of the equation?