I don't think the Cubs made some kind of rash move when they called up Starlin Castro. Sure, he's not even two months past his 20th birthday, but it's hard to hold him back. Why? Well, I can't be sure seeing how I've only watched him play a few times, and not since Spring Training. But they said he was ready defensively last year, and his hitting seems to have improved this year.
- In 2009 and 2010 Castro put the ball in play just over 80% of the time (81.3 in 2009, 81.7 in 2010)
- Castro struck-out in 62% of his ball-not-in-play plate appearances in 2009, just 52% in 2010.
- His ground ball rate has gone from a mildly concerning 51% to an above average 43%
- Those ground balls have turned into fly balls (+4%) and pop-ups (+3%) more than line drives (+1%)