WWE.com is reporting that World Heavyweight Champion Dolph Ziggler has suffered a concussion at this week’s Smackdown taping. “He [was] having some memory difficulties and a bit of a headache … he definitely has a concussion,” said WWE physician Dr. Michael Sampson. “We’re checking him out, and going to be doing neuropsychological testing and just keep it monitored.”
Also, WrestlingInc.com reported this:
According to a source, there was talk earlier today about seeing if Vince McMahon wanted to pursue other options without Dolph Ziggler as World Heavyweight Champion after Ziggler suffered a legitimate concussion at last night’s SmackDown taping. Vince felt that it would be premature to go down that road today, and there are no plans to alter current storylines based on Ziggler’s concussion.
F4WOnline.com reported this evening that Ziggler has been removed from all in-ring bookings until he has passed an imPACT test indicating that he is healthy enough to perform.

