13. Hornswoggle - 10 Years
What does it say about WWE when one of their veterans is Hornswoggle? So many wrestlers have come and gone, but the four footer has been there for a whopping ten years, having debuted on Smackdown in May 2006. That's ten years of main roster television, which is an extraordinary achievement that sets him out as one of the definitive company veterans. He knows the backstage area as well as anyone, and is very much one of the boys. The weird thing is it isn't even like WWE have had any real reason to keep him employed. He hasn't had a meaningful role in years, but his career somehow continues to endure.