Chevron left the Pogues in the 90s but came back in the early oughts. He was an unofficial spokesman of sorts for the band and also oversaw the remastering of the Pogues’ back catalog on CD. Chevron, whose songwriting credits include the fan favorite “Thousands are Sailing,” had been battling esophageal cancer since 2007; it was thought to be in remission last year when doctors discovered an inoperable tumor.