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Baseball's Top 20 Young Pitchers
20Ubaldo Jimenez, 24, Rockies
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NOTE: All pitchers on this list will be 25 or younger as of June 30, 2008.

Even with just 17 games of big league experience, he's earned the third slot in the Rockies' starting rotation, and with better location on his 100-mph fastball, Colorado could have an ace in the making.
Photo: Al Tielemans/SI