WWE’s story on Randy Orton’s concussion from Monday’s RAW is that he suffered a concussion when Daniel Bryan hit him with the World Heavyweight Title but this is likely just a storyline reason.
During the match against Big Show when the injury occurred, Orton can be seen getting up and his legs weren’t steady, after delivering the RKO to Big Show. Orton got up from the RKO slowly and immediately grabbed his head.
Backstage at RAW on Monday, nobody knew Orton was injured or at least they weren’t talking about it.
Orton is expected to miss at least two weeks of action as WWE would rather have him perfectly healthy heading into WrestleMania 28.