Richard Kind has appeared in eight episodes of the HBO comedy, starting in Season 3, as Larry’s cousin Andy.

“That was a recurring role, and every time I got to show up was just one of the highlights of my week. I just loved being with those people. Jeff Garlin is one of my dearest friends. He’s one of the funniest people I know. Larry… it goes beyond. How do you sum up that man? And for how many seasons… it’s crazy. I don’t know how he does it. I simply don’t.

I once saw him years before "Seinfeld", or just a year before Seinfeld, and I asked him what he was doing. That was on the golf course. And then later on, I asked him if he was a chess prodigy. Because he thinks three to four steps ahead of what we’re thinking of. So he presents a problem that he knows will be resolved within the story that he’s presented, many, many scenes later. Resolving a scene is one thing, but resolving a story so much later on… He did it on Seinfeld, with three or four storylines about the characters. They never intersected until the end, and they all had an effect on each other. I still marvel at them.”

https://tvline.com/lists/richard-kind-interview-tv-roles-list-mad-about-you-spin-city-curb-your-enthusiasm/richard-kind-interview-curb-your-enthusiasm/