Kane's injury has been revealed as a torn Achilles tendon, according to PWInsider.

The injury reportedly occurred on SmackDown Live last week, where Kane teamed with Daniel Bryan and the New Day to defeat Sanity and the Bludgeon Brothers. 

Team Hell No were scheduled to face the Bludgeon Brothers for the SmackDown Live Tag Team Championships at Extreme Rules, but were attacked backstage. 

Kane is not expected to return anytime soon, not only because of his injury, but due to him continuing to campaign to be Mayor of Knox County, Tennessee.