Rick Rosas was an L.A.-based session musician who had recorded and toured with Neil Young, off and on, for more than a quarter century. He’d also played with people like Joe Walsh, the Buffalo Springfield, and Crosby, Stills, Nash & Young. Early this year, he toured with Neil Young & Crazy Horse, filling in for regular bassist Billy Talbot after Talbot suffered a stroke. But as the fan site Neil Young News reports, Rosas has died. No cause of death has been announced. Rosas was 65.