Ricky Dean Logan is The Freak in The Trip (Season 4 Episode 1).

Rif Hutton is Salesman in The Dealership (Season 9 - Episode 11).

Rob Schneider is Bob Grossberg in The Friar's Club (Season 7 Episode 18).

Robert Donley is Ben Cantwell in The Old Man (Season 4 Episode 18).

Robert Hooks is Joe Temple in The Couch (Season 6 Episode 5) and in The Diplomat's club (Season 6 Episode 22).

Robert Katims is Arnold Deensfrei in The Jimmy (Season 6 - Episode 18).

Robert Kino is Ricky's Boss in The Pie (Season 5 Episode 15).

Robert Mailhouse is Robert in The Beard (Season 6 Episode 16).

Robert Noble is Salesman in The Smelly Car (Season 4 Episode 21).

Robin Nance is Model #3 in The Bizarro Jerry (Season 8 Episode 3).

Roger Eschbacher is Man with Cane in The Dinner Party (Season 5 - Episode 13).

Roger McDowell is Himself in The Boyfriend (Season 3 Episode 17).

Roger Nolan is The Chiropractor in The Pen (Season 3 Episode 3).

Rolando Molina is Punk #1 in The Opposite (Season 5 Episode 22).

Ron Evans is Bodybuilder in The Parking Garage (Season 3 Episode 6).

Ron Ross is Homeless Man in The Mango (Season 5 Episode 1).

Ron Steelman is Artie Levine in The Stakeout (Season 1 Episode 2).

Ron West is Dr. Strugatz in The Shower Head (Season 7 Episode 16).

Rondi Reed is Mary, Jerry's neighbor in The Kiss Hello (Season 6 Episode 17).

Rosalind Allen is Diane DeConn in The Marine Biologist (Season 5 Episode 14).

Rosie Malek-Yonan is Wife The Strongbox (Season 9 Episode 14).

Ross Evans is Harold Reichman in The Opera (Season 4 Episode 9).

Roy Brocksmith is Landlord in The Nose Job (Season 3 Episode 9).

Rozsika Halmos is Manya in The Pony Remark (Season 2 - Episode 2).

Rudy Giuliani is Himself in The Non-Fat Yogurt (Season 5 - Episode 7).

Ruth Cohen is Ruthie in 101 episodes of Seinfeld. The first: The Trip (Season 4 Episodes 1-2).

Sab Shimono is Executive #1 in The Checks (Season 8 Episode 7).