Leo J. McMahon

1950s

1. 1951

   Gunplay

   Henchman Zeke

2. 

   Fort Worth

   Gunman (uncredited)

3. 1950

   Storm Over Wyoming

   Zeke - Henchman (as Leo McMahon)

1940s

1. 1948
   

   Station West

   Rider (uncredited)

   65
2. 1947
   

   The Marauders

   Burly Worker-Henchman with Torch

3. 1943

   Border Patrol

   Cowhand

4. 1941

   Riders of Death Valley

   Barfly

5. 1940

   The Border Legion

   Barfly

1930s

1. 1939

   Renegade Trail

   Cattle-Prodder

2. 1938

   The Mysterious Rider

   Cowhand Montana

3. 

   Pride of the West

   Johnson

4. Heart of Arizona

   Twister

5. 1937
   

   Texas Trail

   Army Corporal

6. 

   Hopalong Rides Again

   Bar 20 Cowhand

7. 

   North of the Rio Grande

   Pete

8. Hills of Old Wyoming

   Steve

9. 

   Borderland

   Henchman

10. 1936

    Hopalong Cassidy Returns

    Cowhand

1950s

1. 1951
   

   Warpath

   Stunts

   61
2. 

   Fort Worth

   Stunts

3. 1950

   Dakota Lil

   Stunts

1940s

1. 1948
   

   Station West

   Stunts

   65
2. 1941
   

   They Died with Their Boots On

   Stunts

   72

3. Riders of Death Valley

   Stunts

1930s

1. 1939

   Renegade Trail

   Stunts

2. 1938

   The Mysterious Rider

   Stunts

3. 

   Cassidy of Bar 20

   Stunts

4. 1937
   

   Hopalong Rides Again

   Stunts

5. Hills of Old Wyoming

   Stunts

1970s

1. 1970

   Madron

   Story, Screenplay