No doubt the Raiders' defense was their Achilles' heel last season.
Another move across the Bay -- this time it's a former 49er headed to Oakland.
The 49ers agreed to terms late Saturday on a two-year contract for wide receiver Mario Manningham, giving the team two free-agent acquisitions at the team's biggest offseason need.Manningham j
Veteran cornerback Shawntae Spencer, whom the 49ers released on Thursday and remains in the Bay Area, visited the Raiders on Friday, a source told CSNBayArea.com.
The 49ers are approximately 18 million under the salary cap after figuring in the return of cornerback Carlos Rogers, along with the space cleared with the release Thursday of veteran cornerback Sh