Doobie Brothers percussionist Bobby LaKind died following a long battle with cancer and just two months after reuniting with the band for a pair of concerts to benefit his two sons.LaKind was 47 when he died Dec. 24, said Michael Coats, a spokesman for the band. “He was in really a lot of pain for the last couple days,” said Bruce Cohn, the band’s longtime manager. Aware of the seriousness of his illness, LaKind reunited in October with the dozen men who formed the Doobie Brothers to play two benefit concerts in California to build trust funds for his sons, Cutter, 4, and Logan, 5. The concerts, held at Los Angeles and Concord, raised over $ 75,000. LaKind was living in Los Angeles and was married but separated from his wife. He joined the 1970s rock ‘n’ roll powerhouse as part of the lighting crew, and sat in with the band before becoming a full-time member. He remained with the group until it split in 1982. The band released a farewell album the year after they split, the group’s 12 th album. LaKind also returned to perform on “Cycles,” the band’s 1989 reunion album, but was not in the 1990 reunion tour. The Doobie Brothers formed as a bar band in the early 1970s and in 1971 released their self-titled debut album. Hit songs followed: “Listen to the Music ,”"Jesus Is Just Alright,”"Long Train Runnin’,”"China Grove,”"Another Park, Another Sunday,”"Eyes of Silver” and “Black Water.” A memorial service will be held when the band members return from the holidays, Coats said.