San Francisco 49ers quarterback Alex Smith practices during an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers quarterback Alex Smith, right, and running back Frank Gore practice during an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers linebacker Aldon Smith practices at an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers head coach Jim Harbaugh, right, talks with referees before practice at an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers head coach Jim Harbaugh yells during practice at an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers defensive tackle Justin Smith gestures during practice at an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers running back Brandon Jacobs kneels at practice at an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers linebacker Patrick Willis stretches before practice at an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Francisco 49ers wide receiver Mario Manningham, right, practices with cornerback Carlos Rogers at an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)