Len Lesser is the Uncle Leo in 14 episodes. The first: The Pony Remark (Season 2 Episode 2).
Lloyd Bridges is Izzy Mandelbaun in The English Patient (Season 8 Episode 17) an in The Blood (Season 9 Episode 4).
Lou Cutell is Dr. Howard Cooperman in The Fusilli Jerry (Season 6 Episodes 21).
Louis Mustillo is Phil, Jerry's neighbor in The Strongbox (Season 9 Episode 14).
Marc Hirschfeld is Tennis Crowd in The Lip Reader (Season 5 Episode 7) and a Business Man in The Puerto Rican Day (Season 9 Episode 20).
Marcelo Tubert is Father in The Puerto Rican Day (Season 9 - Episode 22).
Marco Rodríguez is Guillermo in The English Patient (Season 8 Episode 17).
Mario Joyner is Lamar in The Puerto Rican Day (Season 9 - Episode 20) and himself in The Engagement (Season 7 - Episode 1).
Mark Beltzman is Bob, a chef and a suit buyer in The Pie (Season 5 Episode 15).
Mark Boone Junior is OTB Patron in The Subway (Season 3 - Episode 13).
Mark Christopher Lawrence is the the skycap in The Airport Season 4 Episode 12).
Mark Larson is Vargas, the Bizarro Newman in The Bizarro Jerry (Season 8 Episode 3).
Mark Metcalf is Bob Cobb, a.k.a The Maestro in The Maestro (Season 7 - Episode 3) and in The Doll (Season 7 - Episode 16).
