Via Blake's Instagram:
My past four years here at the University of Michigan have been great! Nothing but love and appreciation for Ann Arbor, the faculty, the coaches, the support staff and the great fans but after many sleepless nights and much prayer I have decided to play my final year of eligibility elsewhere. I truly thank those that have been there for me and hope you would continue to do so. #ForeverGoBlue
So, that's that.
Not sure what went down, but unlike the Norfleet situation, this doesn't appear to be disciplinary issue at all.