Seth Rollins seems like he may have been injured during his match with Kevin Owens at WWE Clash Of Champions. It appears like the injury happened when Owens hit a rather gruesome looking gut buster off the top rope. Seth Rollins then continued to favor his ribs throughout the entire match, and looked as if he was in a lot of pain.
Rollins was still holding his ribs as he walked through the curtain, a source has said. Do note that Rollins and WWE have not said anything yet, so it's just a rumor for now.
This Owens-Rollins feud is expected to continue and it’s looking like (if Rollins is turned out not injured) they will have a rematch at next month’s Hell in a Cell pay-per-view.
Yes, he could be selling it, but either way it's not been confirmed if it's just him selling it or not as of yet.