|First Appearance||"The Little Jerry"|
|Last Appearance||"The Finale, Part 2"|
|Portrayed By||Miguel Sandoval|
Marcelino is a grocery store owner. He is portrayed by Miguel Sandoval.
In "The Finale, Part 2," he kept saying "cockfighting" to Mr. Hoyt when asked about Jerry Seinfeld's group. While the jury was deciding on the verdict, Marcelino was seen lingering in the halls of the courthouse with Mabel Choate, Justin Pitt, Joe Bookman, and some other people.