Richard Kind co-starred with Paul Reiser and Helen Hunt on the hit NBC sitcom, playing Mark, the doctor pal of New York newlyweds Paul and Jamie, and reprised the role in the 2019 revival.

“That was a lovely show. The two of them were brilliant. I used to call myself parsley on a plate of meat and potatoes. But I didn’t really do any after the second season. I wasn’t invited back, believe it or not. And then later on, about Season 7 or 8, I came back and did a few guest spots. But I had gone off to do Spin City.”

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