According to sources, WWE officials are very concerned with Fandango's recent concussion. He suffered the injury at a SmackDown television taping two weeks ago. Although he initially passed his imPACT test at RAW last week, he is still undergoing WWE's secondary testing and has not been cleared to return as of this writing.
For those unaware, Fandango has suffered several previous concussions in WWE prior to debuting on the main roster. This was when he was working in NXT/developmental as Johnny Curtis.