He is best known for his work on the following projects:
Movies:
* The Sting (1973) - Co-writer (with David S. Ward)
* The Seven-Ups (1973) - Co-writer (with Steve Shagan)
* The Cassandra Crossing (1976) - Writer
* Mikey and Nicky (1976) - Writer, Director
* The Deep (1977) - Writer, Director
* The Choirboys (1977) - Co-writer (with William Goldman)
* The Last Days of Frank and Jesse James (1981) - Director
* Jagged Edge (1985) - Co-writer (with Joseph C. St. Pierre)
* Mystic Pizza (1988) - Writer
* The Shadow (1994) - Director
* The Insider (1999) - Writer (uncredited)
Television:
* The Paper Chase (1978-1986) - Writer (multiple episodes)
* Hill Street Blues (1981-1987) - Writer (multiple episodes)
* The Equalizer (1985-1989) - Writer (multiple episodes)
* Murder, She Wrote (1984-1996) - Writer (multiple episodes)
* The Commish (1991-1995) - Writer (multiple episodes)
* NYPD Blue (1993-2005) - Writer (multiple episodes)
* The Practice (1997-2004) - Writer (multiple episodes)
He has also been involved in numerous other projects in different capacities.
It's important to note that this list focuses on his most prominent work.