Leo J. McMahon

1936

• [ ] Hopalong Cassidy Returns (Cowhand) 

1937

• [ ] Hopalong Rides Again (Bar 20 Cowhand) 
• [ ] Borderland (Henchman) 
• [ ] Hills of Old Wyoming (Steve) 
• [ ] Texas Trail (Army Corporal) 
• [ ] North of the Rio Grande (Pete) 

1938

• [ ] The Mysterious Rider (Cowhand Montana) 
• [ ] Heart of Arizona (Twister) 
• [ ] Pride of the West (Johnson) 

1939

• [ ] Renegade Trail (Cattle-Prodder) 

1940

• [ ] The Border Legion (Barfly) 

1941

• [ ] Riders of Death Valley (Barfly) 

1943

• [ ] Border Patrol (Cowhand) 

1947

• [ ] The Marauders (Burly Worker-Henchman with Torch) 

1948

• [ ] Station West (Rider (uncredited)) 

1950

• [ ] Storm Over Wyoming (Zeke - Henchman (as Leo McMahon)) 

1951

• [ ] Gunplay (Henchman Zeke) 
• [ ] Fort Worth (Gunman (uncredited)) 

1937

• [ ] Hopalong Rides Again (Stunts) 
• [ ] Hills of Old Wyoming (Stunts) 

1938

• [ ] The Mysterious Rider (Stunts) 
• [ ] Cassidy of Bar 20 (Stunts) 

1939

• [ ] Renegade Trail (Stunts) 

1941

• [ ] Riders of Death Valley (Stunts) 
• [ ] They Died with Their Boots On (Stunts) 

1948

• [ ] Station West (Stunts) 

1950

• [ ] Dakota Lil (Stunts) 

1951

• [ ] Warpath (Stunts) 

1970

• [ ] Madron (Screenplay) 
• [ ] Madron (Story)