Prosky's other notable movies include Gremlins 2: The New Batch (1990), Hoffa (1992), Mrs. Doubtfire (1993), Last Action Hero (1993), Rudy (1993), Miracle on 34th Street (1994), Dead Man Walking (1995), and Mad City (1997).

[7] Prosky appeared in Thief, Hanky Panky, The Natural, Hoffa, Broadcast News, Things Change, The Great Outdoors, Loose Cannons, Rudy, Mrs. Doubtfire, Green Card, and Dead Man Walking.

He also appeared as Will Darnell, the man who owned the auto repair shop where Arnie Cunningham (Keith Gordon) rebuilds the possessed car "Christine" in the film based on Stephen King's novel.

In addition to his film and television career, he appeared in numerous productions at the Arena Stage in Washington, D.C., most notably as Willy Loman in Death of a Salesman.

He continued to perform on stage and present lectures on his long career at universities, film festivals, for theater benefits, business groups and on cruises.