What's in a name?

I could help but notice a couple of things as I watched the game last night.

The Dolphins have Steve Fifita, which is pronounced like "fifty-a"...but he's wearing number 60. What's up with that?

There's also a guy named Harry Tuff. He had some big tackles, because, well, he's a tough guy. But we hear that he sleeps with a teddy bear.