Bryce Harper has taken Major League Baseball by storm at the tender age of 19 years old, which got us thinking about the most notable teenage debuts in the history of the game. Here are a few of the ballplayers who stood out the most, regardless of era, and with a little help from the rest of their careers.

The trends have changed over time, with younger players like 15-year-old Joe Nuxhall getting more shots early in the last century thanks to a less structured minor league system or wars overseas that drained the talent pool. As time has gone on, the teenage debut has become rarer, which makes Harper's ascendance all the more remarkable.

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