Cornerback Chris Culliver said he injured his right knee in Saturday's preseason game against the Texans and would not take part in Sunday's game against the Broncos. Culliver said the injury was not long term, but he has missed the two practices earlier this week, and he'll likely be out for today's session as well.
The injury probably is no big deal in the long term, but it may reveal the 49ers' depth chart at cornerback. Culliver comes into the games when opponents send three wide receivers onto the field. He was in on 41 percent of San Francisco's defensive snaps last year. Against the Texans', he was in on nearly every play.
In those situations, Carlos Rogers slides into the nickel position and Culliver fills in on the outside at cornerback. With Culliver out against the Broncos, it will be interesting to see whether ex-Bronco Perrish Cox or Tramaine Brock, who struggled on two deep passes Saturday, takes over his role.
Brock was the No. 4 cornerback last season. Cox has had an impressive offseason and also likely will be the 49ers' No. 2 nickel cornerback. He had a diving interception against the Vikings Aug. 10.
-- Matt Barrows








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