Did any of the cast play on Roseanne?

Yes, several cast members from "The Conners" have appeared on "Roseanne." Notably, John Goodman (Dan Conner) and Laurie Metcalf (Jackie Harris) are mainstays from "Roseanne." Other actors, such as Sara Gilbert (Darlene Conner), also transitioned from "Roseanne" to "The Conners."