Pat J. O'Brien Filmography
- Actor (15 credits)
- Bury Me Not on the Lone Prairie (1941)
- Doomed Caravan (1941) Henchman Jim Ferber
- Bar 20 Justice (1938) Frazier
- Flaming Frontiers (1938) Harper - Henchman
- Panamint's Bad Man (1938) Adams, Mine Owner
- Hawaiian Buckaroo (1938) Steve Wainwright
- Tim Tyler's Luck (1937) Patrolman Berry, not listed in credits
- Tailspin Tommy in The Great Air Mystery (1935) Milt Howe
- The Roaring West (1935) Cowhand Steve
- Outlawed Guns (1935) Babe Rivers
- Laughing at Life (1933) Firing Squad Officer, not listed in credits
- Fury of the Wild (1929) Jim Thayer
- The House of Terror (1928)
- Determination (1922) Bit Part, not listed in credits
- Shadows of the West (1921) Jim Kern
