The San Francisco 49ers began their NFL preseason slate with an ugly 30-9 loss against the Denver Broncos in Santa Clara. The 49ers scored all nine points in the first quarter, but it was all Broncos ...

The 49ers just lost their preseason opener to the Denver Broncos by a score of 30-9. Here are the 49ers' grades for this performance.

Defensively, the Broncos poured it on, taking the ball away four times, and sacking the quarterbacks twice. Depth standouts included safety JL Skinner (forced fumble) and cornerbacks Kris ...