San Francisco 49ers quarterback Colin Kaepernick throws during practice at the team's NFL football training facility in Santa Clara, Calif., Tuesday, June 11, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers tight end Vernon Davis makes a reception during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
ADVANCE FOR WEEKEND EDITION, JUNE 15-16 - FILE - In this Feb. 1, 2013, file photo, San Francisco 49ers head coach Jim Harbaugh and Baltimore Ravens head coach John Harbaugh pose with their father Jack Harbaugh during a news conference for the NFL Super Bowl XLVII football game in New Orleans. The patriarchs of the NFL's first family of quarterbacks and coaches are anything but interfering dads. In fact, Archie Manning and Jack Harbaugh are just as influenced by their successful sons as their boys are by them. And that's a special quality they cherish on Father's Day, and every day. (AP Photo/Patrick Semansky, File)
San Francisco 49ers offensive guard Mike Iupati (77) goes through strengthening drills during practice at the team's NFL football training facility in Santa Clara, Calif., Tuesday, June 11, 2013. (AP Photo/Marcio Jose Sanchez)
From left, San Francisco 49ers defensive back Nnamdi Asomugha (24), defensive back Michael Thomas (36), cornerback Lowell Rose (40) and linebacker Dan Skuta (51) run during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers quarterback Colt McCoy throws during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers running back LaMichael James, left, and running back D.J. Harper go through blocking drills during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers defensive end Aldon Smith, left, running back Frank Gore, center, and defensive end Justin Smith take a break during practice at the team's NFL football training facility in Santa Clara, Calif., Tuesday, June 11, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers linebacker Patrick Willis wears a visor with the team logo during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
ADVANCE FOR WEEKEND EDITION, JUNE 15-16 - FILE - In this Nov. 24, 2011 file photo, Baltimore Ravens head coach John Harbaugh, left, chats with his brother, San Francisco 49ers head coach Jim Harbaugh, center, and their father, Jack, before an NFL football game in Baltimore. The patriarchs of the NFL's first family of quarterbacks and coaches are anything but interfering dads. In fact, Archie Manning and Jack Harbaugh are just as influenced by their successful sons as their boys are by them. And that's a special quality they cherish on Father's Day, and every day. (AP Photo/Nick Wass, File)
San Francisco 49ers defensive back Nnamdi Asomugha (24) runs drills during NFL football minicamp at the team's training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers quarterback Colin Kaepernick (7) throws during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers linebacker Patrick Willis runs drills during NFL football minicamp at the team's training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers linebacker Patrick Willis runs drills during practice at the team's NFL football training facility in Santa Clara, Calif., Tuesday, June 11, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers head coach Jim Harbaugh watches his team during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers wide receiver Anquan Boldin runs after a reception during practice at the team's NFL football training facility in Santa Clara, Calif., Tuesday, June 11, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers defensive end Justin Smith goes through strengthening exercises during practice at the team's NFL football training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers head coach Jim Harbaugh watches his team during practice at the team's NFL football training facility in Santa Clara, Calif., Tuesday, June 11, 2013. (AP Photo/Marcio Jose Sanchez)
San Francisco 49ers running back Marcus Lattimore runs during NFL football minicamp at the team's training facility in Santa Clara, Calif., Wednesday, June 12, 2013. (AP Photo/Marcio Jose Sanchez)
