He could come back based on the rules ... but I don't recall ever having a transfer who was also academically ineligible.
The wording in the FAQ is that ineligible players at Div-1 have:
3 years of eligibility (depending on their collegiate gpa, they may be granted a 4th year of eligibility if they maintain a 2.7 cumulative GPA or higher)
Whereas for Div-2 it says:
player will have 4 years of eligibility.
So, it would seem that at Div-1, there is a chance that an ineligible player will say that he is done with college and not play as a 5th year Senior; while at Div-2, they do play for 4 years all the time. At Div-3, it doesn't matter as they can play from the beginning.