Per NCAA regulations, he has to be enrolled at SU for one year before he becomes eligible again.
14.5.1 Residence Requirement—General Principle.
A student who transfers (see Bylaw 14.5.2) to a member institution from any collegiate institution is required to complete one full academic year of residence (see Bylaw 14.02.15) at the certifying institution before being eligible to compete for or to receive travel expenses from the member institution
14.02.15 Residence.
Residence is enrollment in a full-time academic program (as defined by the institution) at a collegiate institution during a regular term of an academic year. A summer term may not be used to satisfy an academic term of residence. Any student-athlete (e.g., qualifier, nonqualifier, transfer student) admitted after the 12th class day may not use that semester or quarter for the purpose of satisfying an academic term or year of residence. (Revised: 4/14/10)