According to Wikipedia, Milton Addas “Mitt” Romney (June 20, 1899 – November 1975) was a professional American football player who played in the offensive backfield for the Racine Legion from 1923 to 1924.
He was a quarterback for the Chicago Bears from 1925 to 1929, according to chicagomag.com.
The elder Mitt Romney was the cousin of George W. Romney, the father of the 2012 Republican Presidential nominee Mitt Romney. The elder Mitt Romney played quarterback for the University of Chicago in the early 1920s when it had a winning varsity team, and was elected captain of the team in 1922. After graduating from the U of Chicago in 1923, Romney was head basketball (yes, not football) coach at the University of Texas at Austin during the 1922–23 season. He coached the Longhorns to a record of 11–7.
The elder Mitt Romney was born in Salt Lake City, Utah. Mitt Romney (the former presidential candidate) is his namesake and is a first cousin once removed.