report. "Cash feels he is physically not up to the tour," the network quoted his publicist as saying. The Rock and Roll and Country Hall of Famer "felt he had to go public," the publicist said. Cash, whose image as country music's "Man in Black" became a standard for a generation of Nashville upstarts, has recorded 1,500 songs and appeared on 500 albums, ABC said. In the early 1950s he began singing country music and in 1955, while working as an appliance salesman in Memphis, he auditioned for the legendary Sun Records label. The result was his first hit, "Hey Porter", which was quickly followed by "Folsom Prison Blues", "I Walk the Line" and other successes stamped with his unmistakable voice and no-frills arrangements. Among his career cornerstones are songs such as "Busted," "Ring of Fire," "Orange Blossom Special," "Jackson," "Daddy Sang Bass" and "Sunday Morning Coming Down." At one time Cash played some 200 concerts a year. Cash, who had won practically every existing country music award, in 1992 was inducted to the Rock and Roll Hall of Fame.