Both Harbaugh brothers say they often laugh when they see each other in the media.
The two added they have discussed their meeting in the Super Bowl, but only briefly.
One is on the east coast, the other is on the west. One has a mobile quarterback, and the other has a prototypical pocket passer.
49ers coach Jim Harbaugh and Ravens coach John Harbaugh sat down for an interview, and the brothers weren't shy answering questions about each other.
Joint practices seem to be a growing trend in the NFL, and after three days of Ravens-49ers practices this week, both teams agreed that they'd like to do it again in the future.
WR Anquan Boldin spent three years in Baltimore before being traded to San Francisco while on a relief mission in Africa.