49ers' Fred Warner: Nursing chest injury

Warner did not practice Sunday due to a chest injury and is considered day-to-day, Nick Wagoner of ESPN.com reports.

It's unclear exactly when Warner suffered the injury, but it doesn't seem to be too serious given that he's being evaluated on a day-by-day basis. Warner was selected by the 49ers in the third round of this year's draft and is expected to contribute immediately at linebacker in San Francisco.