
Born in Shawnee, Oklahoma, Cobb auditioned for producer Hal Roach's comedy series at the age of five. He appeared in 86 Our Gang episodes during seven years, and had three guest appearances in the serial in the 1930s. His first Our Gang short was The Big Show. Cobb appeared in the Our Gang series' last silent film, Saturday's Lesson, and its first talking short, Small Talk. He was a recognizable character, with chubby cheeks and a trademark beanie cap. Some sources indicate that his final film with the Gang was Bouncing Babies; however, he does not appear onscreen in that short. His last film as a regular cast member was the previous entry Lazy Days, but he would also return for cameos in three more shorts over the years: Fish Hooky, Pay as You Exit, and Reunion in Rhythm. After his acting career ended in the early 1940s, Cobb became an assembler for North American Aviation, a division of Rockwell International. He retired in 1981.
Cobb died of natural causes on May 21, 2002.

Girl Shy
1924 · as Boy in Tailor Shop (uncredited)

Going Hollywood: The '30s
1984 · as (archive footage)

A Yank at Oxford
1938 · as Boy with Drum (uncredited)

Classic Comedy Teams
1986 · as Our Gang (archive footage)

Heebee Jeebees
1927 · as Joe

One Wild Ride
1925 · as Joe

The Our Gang Story
1994 · as Joe (archive footage)

Pay As You Exit
1936 · as Fat Kid

A Pleasant Journey
1923 · as Joe

Railroadin'
1929 · as Joe

Mary, Queen of Tots
1925 · as Joe

Boxing Gloves
1929 · as Joe

Seeing the World
1927 · as Joe

Bouncing Babies
1929 · as Joe (unconfirmed)

45 Minutes from Hollywood
1926 · as Himself (archive footage) (uncredited)

Telling Whoppers
1926 · as Joe

Cat, Dog & Co.
1929 · as Joe

Good Cheer
1926 · as Joe