Thank you all for your input. I looked at the ncaa.org site and found it somewhat confusing but learned a few things. I noticed the same thing VJC said about the self-release being D3 to D3 only.
We are doing more research on ncaa.org and making sure that the academic side of the question comes first. My son is not definite on his decision to change majors yet. Getting a degree has to be the top priority unless the player is going to play baseball professionally after college.
I'm not sure it matters that much which degree he earns. How many of you parents are working in a job or career that depended completely on the specific degree you earned? I have had several interesting careers in the past 25 years since college and they all required a 4-year degree but none of them were tied to a specific degree.