Because the Boston Red Sox are on the verge of losing a Wild Card race due to epic meltdown, it does not classify as "reaching epic proportions" or "worst collapse in history." Falling from 2nd to 3rd is not epic. It's the Wild Card (read: second place). If you were not, in fact, slated to win anyway of actual substance, then it is not really a collapse.
Please stop carrying on like its Bobby Thompson and the Giants: