Metallica fans everywhere know the band's three bassists? However, some may not know there was actually a bassist before the legendary Cliff Burton joined the band. Ron McGovney's tenure in the band may have been short-lived, but he was there in the beginning when the band began to take shape. The untimely death of the band's beloved Cliff Burton could have spelt the end of the band after just three years. In walks Jason Newsted, who helps the band pick up right where they left off, and after three more years helps catapult them into the mainstream with the release of their "Black Album" in 1991. Unfortunately, not all that glitters is gold, and in 2001 Jason Newsted decided to quit the band. Robert Trujillo assumes the role as Metallica's bassist in 2003, and became the longest reigning bassist in the band's forty year history. With Cliff, Jason, and Robert having impressive resumes, and each creating their own legacy within the band, how can one pick a favorite?