HAIL MARY A Metal Sludge exclusive with ex-Alice Cooper drummer Ken Mary   LOS ANGELES — He signed his first major-label record contract when he was still in high school (with Fifth Angel), and drummer Ken Mary just keeps on rocking. He has recorded and toured with some of music’s biggest acts like Alice Cooper, in addition to being a founding member of legendary pomp band House of Lords plus stints with Impelletteri, Bonfire and[…]