I am able to confirm through a WWE spokesman that Daniel Bryan suffered a concussion on Monday night.
The injury apparently happened during the steel cage tag match main event on this week's episode of Raw. The bout saw Bryan team with Bray Wyatt to oppose The Usos in a re-match from earlier in the show.
So far, neither dot com nor Bryan have acknowledged the injury. Bryan did post a storyline-driven Tweet [about the segment] that you can read at this link.