49ers vs. Ravens: 6 players to watch on defense

The 49ers defense faces its toughest test of the year against the Ravens.

CB Richard Sherman

Stan Szeto-USA TODAY Sports

While Sherman played well last week against the Packers, he was once again called for a couple of penalties that led to Green Bay’s only score of the night. Those penalties can’t happen against the Ravens. Sherman will have to play a disciplined game and not giveaway free yards to an offense that doesn’t need help. He’ll also need to help set the tone early. San Francisco needs to hit early and often, and that may start with the veteran corner on the perimter.