L AS VEGAS -- The 49ers just beat the Raiders 22-19 in a preseason game. Here are the 49ers' grades for this performance.

The is the last thing the 49ers need. Undrafted rookie running back Corey Kiner injured his ankle against the Raiders.

For the past six years, the 49ers' goal was clear: Win the Super Bowl.

Stripped the ball out of rookie wide receiver Junior Bergen's hands. Then on the next play, Martin dove into Isaac Guerendo and tackled him at the line of scrimmage. Martin seems to have a nose for ...