Jeff was a crew member aboard the freighter Kahana. Sayid and Desmond discovered Michael in the engine room, where he was working with Jeff to fix the engines. Soon after Sayid and Desmond entered the engine room, Michael sent Jeff to fetch a pressure valve from the supply room. Jeff did not witness Michael's retelling of the circumstances that led to his being aboard the freighter. ("Meet Kevin Johnson")

Jeff presumably was killed when the Kahana blew up as a result of Keamy's death. ("There's No Place Like Home, Part 3")


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