The Seattle Mariners , who will enter Sunday's Game 6 against the Toronto Blue Jays with a 3-2 advantage in the best-of-seven American League Championship Series, are on the cusp of the first World Series appearance in franchise history. This season is, by a certain definition, already the most successful in Mariners history, for they have never before been only five wins away from a World Series title.

So far as these things go, the Mariners are the most World Series-deprived franchise in all of Major League Baseball. While the Mariners are one of five franchises to never win a World Series, they're the only member of that club to have never even played in one.

That could change in the coming days. First, though, here's a refresher on those five teams and the extent of their title d

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