San Francisco 49ers' NaVorro Bowman prepares for NFL football practice in Santa Clara, Calif., Thursday, Jan. 16, 2014. Bowman has taken on an added leadership role this year after the departures of Frank Gore, Patrick Willis and Justin Smith.
San Francisco 49ers' NaVorro Bowman prepares for NFL football practice in Santa Clara, Calif., Thursday, Jan. 16, 2014. Bowman has taken on an added leadership role this year after the departures of Frank Gore, Patrick Willis and Justin Smith. Ben Margot AP
San Francisco 49ers' NaVorro Bowman prepares for NFL football practice in Santa Clara, Calif., Thursday, Jan. 16, 2014. Bowman has taken on an added leadership role this year after the departures of Frank Gore, Patrick Willis and Justin Smith. Ben Margot AP