As of earlier this week, it appeared that Terrelle Pryor was set to enter the NFL Supplemental Draft. He was banned from the Ohio State program, and that appeared to pave the way towards his entry into the Supplemental Draft. Then, John Clayton dropped this bombshell without explanation.
Terrelle Pryor is ineligible because the NCAA and Ohio State haven't formally ruled anything on him and that needs to happen for the draft
At this point, everyone in the world who follows football and reads twitter got very confused. Thankfully, Ohio sports journalist Lori Schmidt got a comment out of NFL spokesman Greg Aiello, who says that they have not yet made a determination on Pryor's status. This matter appears to be very far from settled.