12 MLB Superstars' Kryptonite They Still Need to Learn to Overcome

The top 12 MLB players got to where they are for one simple reason—great skill.

They took that skill and excelled on the diamond to the point that most of them are perennial All-Stars. Some could even end up in baseball's Hall of Fame.

But even the best of the best have weaknesses. Opponents work to find those weaknesses and exploit them as often as they can.

Here is one skill that each of the top 12 MLB players need to work on in order to become even better. The top players are defined using a list I came up with on December 21, 2012.

Note: All stats courtesy of Baseball Reference or ESPN unless otherwise noted.

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