Kramer's Friends

I'm trying to get a list together of Kramer's friends who are talked about yet unseen. Besides Bob Sacamano, I know of Jay Riemenschneider. If anyone can think of any others, let me know.

Sean

Howbout the baseball player who flipped out when Kramer made him take a penalty stroke? He then killed the dry cleaner, "Poor little Pinkus!"

I think his name was Steve Gendison?