SANTA CLARA, Calif. – The San Francisco 49ers are going to get deeper at cornerback this week as they are expected to activate Eric Wright from the physically unable to perform list.Wright was signed in the offseason to bring experience and ball skills to the defending NFC champions, and he will add to an already strong secondary. The 49ers cornerbacks have played well during the team's has string together a five-game winning streak. The starters are Carlos Rogers and Tarell Brown, and Tramaine Brock has taken over as the nickel cornerback from Nnamdi Asomugha.