San Francisco 49ers tight end Delanie Walker, right, breaks away from Baltimore Ravens cornerback Cary Williams during the first half of the NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Marcio Sanchez)
San Francisco 49ers tight end Delanie Walker, right, breaks away from Baltimore Ravens cornerback Cary Williams during the first half of the NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Marcio Sanchez)
**FILE** Former Colts coach and current Ravens offensive coordinator Jim Caldwell didn't get a single interview for a head coaching position this offseason despite his impressive resume.
Baltimore Ravens head coach John Harbaugh holds the Vince Lombardi Trophy during a news conference in New Orleans on Feb. 4, 2013, after the Ravens' 34-31 victory over the San Francisco 49ers in Super Bowl XLVII. (AP Photo/Darron Cummings)
Baltimore Ravens head coach John Harbaugh holds the Vince Lombardi Trophy during a news conference in New Orleans on Feb. 4, 2013, after the Ravens' 34-31 victory over the San Francisco 49ers in Super Bowl XLVII. (AP Photo/Darron Cummings)
San Francisco 49ers quarterback Colin Kaepernick speaks to reporters at the team's NFL football training facility in Santa Clara, Calif., Tuesday, Feb. 5, 2013. The 49ers lost to the Baltimore Ravens 34-31 in NFL football's Super Bowl XLVII on Sunday. (AP Photo/Jeff Chiu)
San Francisco 49ers quarterback Colin Kaepernick speaks to reporters at the team's NFL football training facility in Santa Clara, Calif., Tuesday, Feb. 5, 2013. The 49ers lost to the Baltimore Ravens 34-31 in NFL football's Super Bowl XLVII on Sunday. (AP Photo/Jeff Chiu)
Baltimore Ravens linebacker Ray Lewis, holding the Vince Lombardi trophy, speaks to fans at a celebration at City Hall at the start of a Super Bowl victory parade Tuesday, Feb. 5, 2013, in Baltimore. Super Bowl MVP and Ravens quarteback Joe Flacco, third from left, smiles. The Ravens defeated the San Francisco 49ers in NFL football's Super Bowl XLVII 34-31 on Sunday. (AP Photo/Gail Burton)
Baltimore Ravens linebacker Ray Lewis, holding the Vince Lombardi trophy, speaks to fans at a celebration at City Hall at the start of a Super Bowl victory parade Tuesday, Feb. 5, 2013, in Baltimore. Super Bowl MVP and Ravens quarteback Joe Flacco, third from left, smiles. The Ravens defeated the San Francisco 49ers in NFL football's Super Bowl XLVII 34-31 on Sunday. (AP Photo/Gail Burton)
