1) Alligators - They may have small arms, but they have vicious teeth. Even though biting should not be part of any wrestling match, there's no telling what their small brains may decide to do when they decide to wrestle (not a knock on them, they actually do have small brains).

2) Bears - Bears are cute and cuddly, but primarily when they're stuffed. They're probably also one of the toughest creatures to wrestle, especially since they have their own patented move: the bear hug.

3) Squirrels - They're small and cute, but they can be vicious if the winner of the wresting match wins a huge bowl of nuts. Plus, they're just too darn quick to wrestle.

4) Babies - Babies are the easiest thing to wrestle on this list, and you have a highly likely chance of winning, but who wants to have bragging rights over a baby? Plus, try to impress anyone with the following sentence, "Yeah, I'm a wrestling champion, I took down 5 babies along the way." It's just not that impressive.

5) Sharks - First of all, sharks live in the water which makes them very difficult to wrestle. Second of all, they'd be more apt to eat you and then claim that there wasn't a wrestling tournament going on. Sure they're lying, but at that point you wouldn't be around to claim otherwise.

6) Hippopotamuses - The toughest of all animals to wrestle, the hippo is the equivalent of a sumo wrestler. They typically weigh over 2,000 pounds which would make them extremely difficult to take down. Plus, if you happened to be pinned down by a hippo it's most likely goodnight for you.

7) Kangaroos - It's not that a kangaroo would be particularly hard to wrestle (they would be, but not as tough as a hippo), but they're most likely to compete in kickboxing and not wrestling. That said, if you do wind up wrestling a kangaroo, you should be careful that you don't get pouched (a scenario where they stuff you in their pouch until the 3 count).