John Ernest Crawford was an American actor, singer, and musician. He first performed before a national audience as a Mouseketeer. At age 12, Crawford rose to prominence playing Mark McCain in the ABC Western series, The Rifleman. Crawford was nominated for an Emmy Award for Best Supporting Actor at age 13 for his work on The Rifleman, which aired from 1958 to 1963. Disney started out with 24 original Mouseketeers. However, at the end of the first season, the studio reduced the number to 12, and...