 By the time the Islanders were dethroned by the Edmonton Oilers in the 1984 Stanley Cup Finals, they had strung together 19 straight playoff series victories, a professional sports record.No team in any of the four major sports has strung together four consecutive championships since.The closest a team in any of the major four North American professional sports has come was when the New York Yankees (MLB), who were one out away from their fourth consecutive World Series championship, fell in the seventh game of the series to the Arizona Diamondbacks in 2001.