I wrote the piece below prior to the 49ers acquiring former USC safety Darnell Bing, who was dropped by the Raiders earlier this week.
The Raiders wanted to use the second-year player as a linebacker. The 49ers, in their press release today, identified him as a safety. Bing likely is in the same boat as Vickiel Vaughn -- facing an uphill battle to become the 49ers' fourth safety.
-- Matt Barrows