SANTA CLARA -- Tackle Anthony Davis is unlikely to join the 49ers on their trip to Carolina after the team reported he suffered a concussion during Thursday's practice and sat out Friday's session.
He was declared out for Sunday's game against the Panthers.
Davis had been set to be a starter -- at guard -- to begin the season. But he missed a practice in the run-up to the 49ers' season opener against the Rams and, according to multiple sources, expressed misgivings about playing guard and being on the team.
He was moved back to tackle, and on Monday served as the reserve for right tackle Trent Brown and for left tackle Joe Staley.