Baltimore Ravens head coach John Harbaugh looks on during an NFL football practice at the team's practice facility in Owings Mills, Md., Thursday, June 13, 2013. (AP Photo/Patrick Semansky)
Baltimore Ravens president Dick Cass, from left, head coach John Harbaugh, general manager and executive vice president Ozzie Newsome and owner Steve Bisciotti speak alongside the Vince Lombardi Trophy at an NFL football news conference on Thursday, Feb. 7, 2013, in Owings Mills, Md. The Ravens beat the San Francisco 49ers 34-31 in Super Bowl XLVII last Sunday. (AP Photo/Patrick Semansky)
**FILE** Baltimore Ravens head coach John Harbaugh (left) and his younger brother, San Francisco 49ers head coach Jim Harbaugh, participate in a Feb. 1, 2013, news conference in New Orleans for Super Bowl XLVII. (Associated Press)
Baltimore Ravens president Dick Cass, from left, head coach John Harbaugh, general manager and executive vice president Ozzie Newsome and owner Steve Bisciotti speak alongside the Vince Lombardi Trophy at an NFL football news conference on Thursday, Feb. 7, 2013, in Owings Mills, Md. The Ravens beat the San Francisco 49ers 34-31 in Super Bowl XLVII last Sunday. (AP Photo/Patrick Semansky)
Baltimore Ravens president Dick Cass, from left, head coach John Harbaugh, general manager and executive vice president Ozzie Newsome and owner Steve Bisciotti speak alongside the Vince Lombardi Trophy at an NFL football news conference on Thursday, Feb. 7, 2013, in Owings Mills, Md. The Ravens beat the San Francisco 49ers 34-31 in Super Bowl XLVII last Sunday. (AP Photo/Patrick Semansky)
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 head coach Jim Harbaugh and Baltimore Ravens head coach John Harbaugh participate in a news conference for the NFL Super Bowl XLVII football game Friday, Feb. 1, 2013, in New Orleans. (AP Photo/Patrick Semansky)
**FILE** Baltimore Ravens head coach John Harbaugh (left) and his younger brother, San Francisco 49ers head coach Jim Harbaugh, participate in a Feb. 1, 2013, news conference in New Orleans for Super Bowl XLVII. (Associated Press)
