Why is the Yankees of 2004 never mentioned for epic meltdowns? They are up 3-0 in the ALCS, have the lead in the 9th inning of Game 4 and have the best post season closer of all-time, Mariano Rivera, on the mound. They blow that game. Then they have a two run lead in the eighth to end the series in Game 5. Mariano Rivera comes in with the Yankees still holding on to a one run lead and the game gets tied up and the Red Sox eventually win. The Red Sox went on to win Game 6 leading the whole way and dominated Game 7. The Yankees were the first team to blow a 3-0 series lead.
Most definitely an epic meltdown. Bill Mueller's single to tie the game is one of the all time clutch hits. Off the top of my head I can't think of too many hits that impressive. I really liked him with the Giants and was sad to see him go (and win a batting title a year or two after).
What makes that meltdown even worse was the dominance the Yanks had in the first three games. They nearly put up 20 runs in game three if I remember correctly. It seemed like they'd cruise to the title especially with the Cardinals waiting for them. It was like a car hitting a brick wall at 70 mph...epic