|First Appearance||"The Rye"|
|Last Appearance||"The Finale"|
|Portrayed By||Frances Bay|
George tries to replace the marble rye his parents stole back from the Rosses. He asked Jerry to purchase one from Schnitzers, but as Jerry gets there, Mabel buys the final marble rye. After refusing to sell Jerry the rye, Jerry steals it from her.
Mabel appears as a resident of Del Boca Vista and has to cast the deciding vote in Morty Seinfeld's impeachment trial. Initially, she does not recognize Jerry, but when she does, she votes in favor of impeachment.
Mabel appears for the final time briefly in The Finale, where she testifies against Jerry. She brings up the fact that he stole the marble rye from her.