I just realized that Phil Burns who played Gene Stafford in Exercise in Fatality was the first actor to play Jerry's father in "Seinfeld". He only played him for one episode before Barney Martin took over.
He also played the role of a judge in an episode of "Hill Street Blues" who mistakenly lets a killer-to-be go free.
And Mary and Kathy's father on MARY HARTMAN, MARY HARTMAN. He was great at playing an aggravated character on that show.