American musician who has been the lead guitarist of heavy metal band Metallica since 1983. Prior to joining Metallica, he co-formed the thrash metal band Exodus in 1979. In 2003, Hammett, along with bandmate James Hetfield, was ranked 23rd on Rolling Stone's list of Greatest Guitarists of All Time. In 2009, Hammett was ranked number 15 in Joel McIver's book The 100 Greatest Metal Guitarists
