Miguel Sandoval is Marcelino in The Little Jerry (Season 8 Episode 11).
Mike Hagerty is Rudy, a cabana wear vendor in The Raincoats (Season 5 Episodes 18-19).
The Summer of George (Season 8 - Episode 22).
Neil Flynn is one of the cops in
The Doorman (Season 6 - Episode 18).
Nigel Gibbs is a tenant in Mr. Pitt's building in
The Stakeout (Season 1 - Episode 2).
Norman Brenner appears in twenty-nine Seinfeld episodes. The first:
The Diplomat's Club (Season 6 - Episode 21) and in The English Patient (Season 8 - Episode 17).
O'Neal Compton is Earl Haffler in
Pat Finn is Joe Mayo. He appears in The Reverse Peephole (Season 9 Episode 12).