WWE.com posted the following:

"WWE.com has learned that Darren Young suffered an ACL tear to his left knee and will require surgery. Dr. Chris Amann tells WWE.com that Young will miss between 4 and 6 months of in-ring action as he recovers from surgery.  

WWE.com will have more updates on Young's condition when it becomes available."

Darren Young (@DarrenYoungWWE) also Tweeted the following:

"I tried 2 tough it out but Doc informed me I tore my ACL&surgery was needed.Surgery was a success now its time 2 live up 2 #nodaysoff #rehab"