WWE is reporting that Seth Rollins re-injured his right knee during the closing segment of this past Monday's RAW during Samoa Joe's attack. They noted that Rollins will be evaluated later this week. They wrote:
Rollins was forced to miss 6 months of action after tearing the ACL, MCL, and medial meniscus in his knee during a match with Kane at a WWE live event in November of 2015. The then-WWE World Heavyweight Champion was forced to vacate his title, and missed last year's WrestleMania 32 pay-per-view.
We will have more shortly. Below is video of Rollins leaving RAW this past Monday night on crutches: