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had a neat article about the most clutch hitters of the retrosheet era. I'm not sure how to hyperlink, but here is the full link: http://www.insidethebook.com/ee/index.php/site/article/best_and_worst_cl...
Ichiro comes in at #34 all time. Pete Rose - #4. I don't fully understand how they measure clutch or how accurate the number are, but it does tell an interesting story.