Mystery Solved! The unknown rodent is an agouti. Thank you DeAnna.
This large rodent was spotted in Mexico.
Comments about the above Unknown Animal
Someone emailed in suggesting this was a Squrat (half squirrel/half rat), however I was unable to find another picture of a squrat online to compare it with besides stuffed toys from the movie Ice Age. Squirrels and rats both have tails and the creature above does not have a tail. This creature almost looks like a cross between a squirrel and a guinea pig, however I believe this is a real species of animal not a cross. Just not sure what type yet.