Brothers are born to fight. From the Bible to this year’s Super Bowl matchup, where 49ers coach Jim Harbaugh will face off against brother John Harbaugh, head coach of the Baltimore Ravens, brothers have been battling throughout history.
Take a look at some of the top brothers clashes that have taken place with the sports world watching. Keep in mind, we're only including brothers who compete head-to-head on the field, court, or sidelines in the case of opposing coaches.
So sorry, Peyton and Eli, and Pedro and Ramon. You don't make the cut.