Baltimore Oriels - only ever won One World Series. Perennial last place occupiers.

My support for them is based on the first ever baseball game I saw on Sky; against the Yankees at their pompous RS-like reign. The Yankees kept pulling ahead, but the Oriels kept pulling the lead back (rather like Everton in the 4-4 cup game) until, after 19 innings it proved too much and they lost (I think) 14-13.