There is no question that the San Francisco 49ers-Seattle Seahawks rivalry is the hottest in the NFL! Two teams that practically mirror each other on the field, they also play inside the same division in the NFC West. However, the rivalry goes back further than that as 49ers head coach Jim Harbaugh (Stanford) and Pete Carroll (USC) had a heated exchange at midfield. A handshake that would since go viral we like to take a stroll down memory as the bad blood between these two great coaches continue in the NFL. Who would you rather have? Harbaugh or Carroll?