Cash's Negro League career came to an end in 1950 when he left the Stars only a few games into the season to join the Mexico City Red Devils. In Mexico, he batted .311, higher than any year he played with the Stars, and registered 15 home runs. Later, Cash went on to play for the Granby Red Sox in the Provincial League of Canada, batting .296 with 16 home runs. Cash signed with Chicago White Sox in 1952, hoping to play for their major league team, but was relegated to their farm teams instead. Cash claimed that the White Sox organization promised him a Class A position, but he was given a Class B position instead. He split the season with the Superior Blues in Superior, Wisconsin, (where he spent less than 10 games) and the Waterloo White Hawks in Waterloo, Iowa. He suffered more injuries throughout the 1952 season, battling bursitis in his shoulder and a broken leg. Cash hit .347, his highest batting average yet, with the Brandon Braves in 1953. For the next three years he played in the Dominican Republic for the Licey Tigers. Cash ended his baseball career in Bismarck, North Dakota, playing alongside other Negro League greats such as Ray Dandridge and Art Pennington. During his last season, he had a career-high batting average of .369. Cash met and fell in love with Sadie Bell Brooks in 1940. The couple married on September 7, 1940. They also had three children, William W. Cash Jr., Janet Cash, and Michael Cash. They were married for 63 years. His family was a great source of his pride. After Cash retired from baseball in 1955, he took a job at Westinghouse Electric, where he worked as a machinist for 30 years. It was a job that he enjoyed because he was training to become a machinist before he started to play baseball. He retired from Westinghouse in 1985. Cash was also very active in his local community, particularly with a dedication to helping the youth of Philadelphia. He was the founder of the Cobbs Creek Little League Association and vice president of the Foundation for Juvenile Decency. In addition to those positions, he also founded the Parkway Little League and served on the Board of Directors for the Negro League Baseball Players Association. He often spoke at schools, churches, and other venues about his life as a baseball player and what hurdles African Americans must overcome in America (Guerilus). Cash also contributed to the foundation of a group called Concerned Black Men who worked with the needy children of Philadelphia ("Sports Reference LLC").