This was reported tonight on WWE.com
During the tag team battle royale tonight on Smackdown Live, Zack Ryder suffered an apparent knee injury during a spot in which he executed the Rough Ryder. If this ends up as a serious injury, that will definitely require some brainstorming as to who will replace the Hype Bros in their eventual title match against the Wyatt Family. This is what the WWE doctor had to say:
"We think he injured his kneecap or his patella. We think it popped out and then popped back in, so we're just going to do an MRI to make sure that there is not cartilage damage or some tendon tearing, stuff like that,” according to WWE's Dr. Chris Robinson. “Hopefully there's not and it'll be a shorter rehab period. If there is, there's a different road we might have to go down that may take longer to get him to recover."
Here's hoping for a speedy recovery for Zack!