MEMPHIS, Tenn. (AP) Sam Phillips, who discovered Elvis Presley and helped usher in the rock 'n' roll revolution, died Wednesday. He was 80. Phillips died at St. Francis Hospital, spokeswoman Gwendolyn McClain said. No details were immediately available about the cause of death or how long he had been hospitalized. Phillips founded Sun Records in Memphis in 1952 and helped launch the career of Presley, then a young singer who had moved from Tupelo, Miss. He produced Presley's first record, the 1954 single that featured ``That's All Right, Mama'' and ``Blue Moon of Kentucky.'' ``God only knows that we didn't...