**FILE** In this Dec. 2, 2012 file photo, San Francisco 49ers quarterback Alex Smith warms up as 49ers head coach Jim Harbaugh, left, stands nearby before the start of an NFL football game against the St. Louis Rams in St. Louis. A person with knowledge of the trade tells The Associated Press that the Kansas City Chiefs have agreed to acquire Smith from San Francisco. The person spoke on condition of anonymity on Wednesday, Feb. 27, 2013, because the trade does not become official until March 12, when the NFL's new business year begins. (AP Photo/Tom Gannam, File)
**FILE** In this Dec. 2, 2012 file photo, San Francisco 49ers quarterback Alex Smith warms up as 49ers head coach Jim Harbaugh, left, stands nearby before the start of an NFL football game against the St. Louis Rams in St. Louis. A person with knowledge of the trade tells The Associated Press that the Kansas City Chiefs have agreed to acquire Smith from San Francisco. The person spoke on condition of anonymity on Wednesday, Feb. 27, 2013, because the trade does not become official until March 12, when the NFL's new business year begins. (AP Photo/Tom Gannam, File)
**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)
San Francisco 49ers head coach Jim Harbaugh argues with field judge Craig Wrolstad during the second half of the NFL Super Bowl XLVII football game Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Gene Puskar)
San Francisco 49ers head coach Jim Harbaugh protests a non-call by the officials after a fourth down play during the second half of the NFL Super Bowl XLVII football game against the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Gene Puskar)
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)
Jackie (left) and Jack Harbaugh, parents of San Francisco 49ers coach Jim Harbaugh and Baltimore Ravens coach John Harbaugh, stand before an NFL football game between the 49ers and the Seattle Seahawks in San Francisco in 2011. (AP Photo/Paul Sakuma)
Jackie (left) and Jack Harbaugh, parents of San Francisco 49ers coach Jim Harbaugh and Baltimore Ravens coach John Harbaugh, stand before an NFL football game between the 49ers and the Seattle Seahawks in San Francisco in 2011. (AP Photo/Paul Sakuma)
