Ellsworth Elmer "Bert" Cunningham (November 25, 1865 – May 14, 1952), was an American Major League Baseball pitcher from 1887 to 1901.

He played for the Brooklyn Grays, Baltimore Orioles, Philadelphia Athletics, Buffalo Bisons, Louisville Colonels, and Chicago Orphans.

On September 15, 1890, while playing for Buffalo in the Players' League, Cunningham threw five wild pitches in one inning.

This record still stands today, although it was tied in a 2000 playoff game by St. Louis Cardinals pitcher Rick Ankiel.

This biographical article relating to an American baseball pitcher born in the 1860s is a stub.