Kevin Conway
- The Gettysburg Address
2025 Daniel Webster (voice)
- The Mayo Clinic
2018 William Worrall Mayo (voice)
- Walden
2017 Henry David Thoreau
- Is That a Gun in Your Pocket?
2016 Cyrus
- The Keepers of the Streak
2015 Narration
- Yosemite — A Gathering of Spirit
2013 Theodore Roosevelt (Voice)
- American Loser
2007 Bert
- Invincible
2006 Frank Papale
- Unforgivable Blackness: The Rise and Fall of Jack Johnson
2004 Other Voices (voice)
- Gods and Generals
2003 Sgt. Buster Kilrain
- Mystic River
2003 Theo (uncredited)
- Mark Twain
2002 Mark Twain (voice)
- Black Knight
2001 King Leo
- Two Family House
2000 Jim O'Neary
- Sally Hemings: An American Scandal
2000 Thomas Paine
- Thirteen Days
2000 Gen. Curtis LeMay
- The Confession
1999 Mel Duden
- Mercury Rising
1998 Lomax
- Calm at Sunset
1996 Kelley Dobbs
- Lawnmower Man 2: Beyond Cyberspace
1996 Jonathan Walker
- Looking for Richard
1996 Hastings
- The Quick and the Dead
1995 Eugene Dred
- The Whipping Boy
1994 Hold-Your-Nose-Billy
- Gettysburg
1993 Sergeant Buster Kilrain
- Jennifer Eight
1992 Chief Citrine
- Breaking the Silence
1992 DA Jack Hastings
- Rambling Rose
1991 Dr. Martinson
- One Good Cop
1991 Lt. Danny Quinn
- When Will I Be Loved?
1990 Jerry Howard
- Homeboy
1988 Grazziano
- Jesse
1988 Ken Brand
- Funny Farm
1988 Crum Petree (uncredited)
- Flashpoint
1984 Brook
- Something About Amelia
1984 Dr. Kevin Farley
- Attack on Fear
1984 Richard Ofshe
- The Elephant Man
1982 Frederick Treves
- The Funhouse
1981 The Barker
- The Lathe of Heaven
1980 Dr. William Haber
- F.I.S.T.
1978 Vince Doyle
- Paradise Alley
1978 Stitch
- The Deadliest Season
1977 George Graff
- The Gardener's Son
1977 James Gregg
- Johnny, We Hardly Knew Ye
1977 David F. Powers
- Shamus
1973 The Kid
- Mr. Inside/Mr. Outside
1973 Fence #1
- Rx for the Defense
1973 Dr. Packer
- Slaughterhouse-Five
1972 Weary
- Portnoy's Complaint
1972 Smolka
- Believe in Me
1971 Clancy
- Hogan's Goat
1971 Peter Boyle
