One of WWE’s top stars returned from injury this week when Dean Ambrose appeared on Raw, but one of SmackDown’s most talented high flyers is now out of action.

Sin Cara recently posted a photo on social media indicating that he’s in Birmingham, Alabama, and now we know why.

The SmackDown Live star underwent knee surgery, and after the operation he posted the following:

“Today we did with doctor Jeffrey Dugas some small adjustments in my knee to return with everything to my terrain. The body is wise and tells you when to stop✋. But he also has memory and knows when to return 👊.”

Right now it’s not known exactly how long Sin Cara will be out of action, but it’s probably safe to say we won’t be seeing him for a while.