In the single-elimination world of college basketball’s postseason, a contender’s season can end thanks to one weak link and an opponent to exploit it. Even the top candidates for the 2014 national title have holes that could send them to a very premature exit in March Madness.

Ohio State will be a Final Four favorite behind a smothering defense led by veteran PG Aaron Craft. However, the loss of frontcourt star Deshaun Thomas leaves Craft without any scorers to feed on the inside.

Herein, a closer look at the Buckeyes and 19 more high-level contenders who could be sunk by one crucial defect.

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