Though he had five roles before Blazing Saddles, it was the role of Mongo that made AlexKarras famous. The horse punch survives today as a GIF found on the Internet
Though not listed on IMDN, Karras played himself in Paper Lion even though the film was based on the 1963 season and Karras had been suspended by the NFL for that year.
In 1969 he was a guest on Daniel Boone
He played an assistant coach
to Vince Lombardi in the 1973 TV Movie Legend in Granite
He was in 1975's Babe and played George Zaharias, Babe Didrikson's husband.
In 1977 he was Iago 'Mad Bull' Karkus in Mad Bull a made-for-TV movie.
1980 in When Time Ran out with Paul Newman
In 1981's Nobody's
In 1982's Porky's he played Sheriff Wallace, Porky's corrupt brother.
Karras played a corrupt football coach in Against All Odds in 1983