Wednesday Seth Roberts wasn’t on the injury report. Thursday he showed up as limited with a concussion.
We don’t know for certain when the concussion occurred, but he did get hit hard from Rob Parker on a pass over the middle in Sunday’s game against the Chiefs. But that hit happened on the Raiders’ first drive and he played the rest of the game, seemingly with no issue. Concussion symptoms can come up days after the initial hit, so it isn’t unusual. The limited practice could just be a precaution.
Should this turn out to be more serious, and Roberts can’t go on Sunday, the Raiders would be fairly thin at receiver.