Pat J. O'Brien

Bar 20 Justice

1938 · Frazier

Tim Tyler's Luck

1937 · Patrolman Berry

Doomed Caravan

1941 · Jim Ferber

Tailspin Tommy in The Great Air Mystery

1935 · Milt Howe

Flaming Frontiers

1938 · Henchman Harper

The Roaring West

1935 · Cowhand Steve

Marry in Haste

1924

Bury Me Not on the Lone Prairie

1941 · Bill Salters

Outlawed Guns

1935 · Babe Rivers

The Freckled Rascal

1929 · Jim Kane

Panamint's Bad Man

1938 · Adams - Mine Owner

Hawaiian Buckaroo

1938 · Steve Wainwright (as Pat O'Brien)

Shadows of the West

1921 · Jim Kern

The House of Terror

1928