Armed with a flawless technique and a larger-than-life ego, John Francis Anthony Pastorius III was the preeminent electric bass player from the time of his first sessions until his untimely death in 1987. The Pennsylvania-born musician was also a fearless collaborator, willing to work with almost anyone, including Joni Mitchell, Jimmy Cliff, and Herbie Hancock. But the virtuoso truly shined on his solo recordings and his output with fusion jazz icons Weather Report.