Rivalries bring out the worst in us as sports fans. They make us hateful people who might flip off an old lady wearing a Dodger cap (don't ask). They make us even more obsessive about our teams than we normally are. And to be honest, it's not healthy. But it sure is fun.
Some rivalries are great. Two top-tier teams fighting it out for dominance over a fresh bed of grass is heaven.
Some rivalries aren't as great. They might be completely one sided. These are the 30 most one-sided rivalries ever.