FYI-WRT to Cambridge if he transferred before which he did he is NOT eligible for the one time free transfer and that includes grad transfers per the new rules. So on the surface he would have to sit a year.
Postgraduate Transfer Eligibility
Q11: What criteria does a student-athlete who has graduated with their baccalaureate degree need to meet to be eligible as postgraduate student at another Division I school?
A11: A student-athlete who graduates with remaining athletics eligibility may be eligible as a full-time postgraduate student at another Division I school provided they meet the one-time exception criteria, including providing a written request to enter the NCAA Transfer Portal to their current school by May 1 if they participate in a fall or winter sport, or July 1 if they participate in a spring sport.
Q12: What if the student-athlete transferred previously from another four-year school as an undergraduate student?
A12: Generally, a student-athlete who has previously transferred from another four-year school would not be able to use the one-time exception as a postgraduate transfer. However, a waiver process exists for postgraduate students with a previous transfer history.