He voiced Krusty's father in the Simpsons.
And in a Roseanne connection, Krusty's voice actor served as her lead out at times when he appeared in Sibs, which flopped so badly it was pulled halfway and the remaining episodes never aired (it ended up on Sky One/Sky Two in Britain though later on, because of The Simpsons connection).
Sibs was basically what partially happened to the soap opera Eldorado here in the UK a year later. ABC saw the success of The Tracey Ullman Show, and thought it would work again. Hence most of the Ullman show writers and producers working on it, Gracie Films as the production company, Dan Castellaneta's casting (because of the success of Julie Kavner with Rhoda) and George Clinton singing the theme.
Don't know if it was a factor besides timeslot, but did the whole Ullman thing put people off watching Sibs in the end regardless of the likes of Jami Gertz and Marsha Mason?
Barely a year later after Sibs died, Fox had Stand By Your Man, a American adaptation of Birds of A Feather with Melissa Gilbert, Miriam Flynn and Rosie O'Donnell in the Sharon, Tracey and Dorien roles. Allan McKeown was EP on this like he was on the original, his WitzEnd production company made it and Sam McMurray was in the cast. Given the connections between McKeown and McMurray, that went down the gurgler, not to mention not being as remembered as Birds of A Feather was.