Unmemorable Wrestlers?

Are there any wrestlers of the past who you later learned about performed for a wrestling promotion that you watched, but you can't remember them ever being there?  For example reading Thomas Hall's retro reviews of the WWE in 2005, I learned that a tag team on the Smackdown Brand managed by Simon Dean, The Gymini, were on there, yet for the life of me I don't recall ever seeing them despite watching the show on a regular basis then.  
People keep telling me that Deuce and Domino were a 50s greaser gimmick and were tag team champions on Smackdown for a while during a period when I was watching the show, and I've seen pictures of them with the belts and I know they existed, but hell if I can remember that.