Jim and John Harbaugh
Sports are already competitive. Then, you take two brothers who happen to be NFL coaches and have their teams duke it out on the field, and some battles are bound to happen. The biggest one of all was when the brothers (who are only 15 months apart) went head to head at Super Bowl XLVII in 2013. John came out on top, and the post-game handshake was interesting. The two fight, says John, especially with their fiery personalities, on and off the field.