SANTA CLARA, Calif. – The San Francisco 49ers have a chance to have one of the deepest cornerback groups in the NFL.Veteran acquisition Eric Wright is eligible to practice next week, and could be ready to play in less than a month. That would give the 49ers Wright and fellow veteran Nnamdi Asomugha as their fourth and fifth cornerbacks.Asomugha has lost his spot as the No. 3 cornerback because Tramaine Brock has been outstanding as Asomugha's injury replacement.