I feel you're perhaps being a tad US-centric here....I understand "antelope" to be a family of animals (the majority of which live in Africa) rather than any one species.

I must also mention the Springboks Rubgy team - though I'd rather not. Another antelope mob.

On another note, I reckon that there's more sports teams named after birds than any other type of animal. This is a WILD guess based upon NO research!!

stales