There are several teams with young players in the Spanish, English, German, and Italian leagues. This includes Manchester City, along with Real Madrid FC, FC Barcelona, AS Roma, Bayern Munich, and other club teams.
Steve Finnan is the youngest player to have played in all top 4 English Leagues at the age of 19
beckham
jorge cadete
The answer to that question is: Christian Poulsen
Brad Fischer for the Oakland Athletics
No. Joe Nuxhall pitched for the Reds when he was 15.
Ronaldo
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liverpool
Lowest available English leagues are Conference North & South
As far as the major leagues go, Derek Jeter's highest batting average was .349, it was the 1999 season.