Casey Wittenberg (born November 30, 1984) is an American professional golfer who had an extraordinarily successful amateur career.
Wittenberg was born in Memphis, Tennessee. He played collegiately at Oklahoma State University. He lost to Nick Flanagan in the finals of the 2003 U.S. Amateur.
In 2004, he finished 13th at the Masters Tournament, the lowest amateur finish in 41 years. He was the only player in the field to improve his score each round. Additionally, he registered the lowest Sunday back 9 score (31) of any amateur in Masters history.