49ers safety Donte Whitner speaks to teammate Ahmad Brooks about making good off-field choices

Safety Donte Whitner has already spoken to San Francisco 49ers teammate Ahmad Brooks ahead of training camp about the importance of making smart decisions off the football field.

Last week, the Santa Clara County district attorney's office declined to pursue assault charges against Brooks because of insufficient evidence in an investigation into allegations that Brooks repeatedly hit teammate Lamar Divens on the head with a beer bottle in a June altercation at Brooks' home.

While Brooks wasn't made available to media Wednesday when veterans for the Super Bowl runner-up Niners reported to team headquarters, Whitner insists "he's tremendously sorry for what he did, anybody would be embarrassed."

General manager Trent Baalke wouldn't say whether Brooks might face disciplinary action from the team. San Francisco's first full-squad practice is Thursday.