Baltimore Ravens coach John Harbaugh and San Francisco 49ers coach Jim Harbaugh are hardly the only high-profile siblings who've squared off in their arena of expertise.
Neither the Baltimore Ravens nor the San Francisco 49ers have any last minute changes to their starting lineups for the Super Bowl.
Americans on Twitter are already buzzing about the Super Bowl with about 6 hours until the game kicks off.
Some of the sports stories The Associated Press is covering Sunday. A full Sports Digest will be sent about 3 p.m. All times EST:
NEW ORLEANS (AP) The Baltimore Ravens have placed cornerbacks Chris Johnson and Asa Jackson on the inactive list for the Super Bowl.