Why is 100 pitches now the "magic number?"

Tim Kurkjian wrote a fantastic article for ESPN the Magazine a few days ago that deals with the evolution of the pitch count. It talks about the history behind pitch counts, why we've become so obsessed with them, why they've become important, and how 100 pitches came to be the magic number starters should throw.

Click here to read the article: Baseball's Magic Number: 100