Dec. 12, 2012 -- 12/12/12 -- will be the last three of a kind on the calendar this century. The next time the month, day and year will be the same numerically? Try Jan. 1, 2101.

To commemorate this occasion, we have selected the 12 of the greatest athletes to wear No. 12. And just so it's not all about numbers, here they are in alphabetical order:

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