Patricia Heaton was pregnant at the time of filming this episode. This is why she only appears in one scene covered by a bedspread. Once, as a joke, Heaton revealed her stomach after Ray's line, "no sex before a game." with the ad-libbed "That's what Del Harris always says". Heaton then threw back her blanket and said, "That's not what he told me" much to the audience's delight. This blooper can be seen as a special feature on the season 3 DVD set.
During the "You've got to be tough" speech that Frank gives to Ray in the kitchen after the ping pong game, he names all the jobs he's had during his life. One job he never mentions is being a real estate agent. In a flashback episode, we learn that not only was he a real estate agent, but he sold Debra and Ray their house, which is located across the street from his.