Astros call-ups won't help mixed leaguers 

June, 21, 2010
The influx of catcher prospects into the big leagues continued Sunday. Following the call-ups of Buster Posey by the San Francisco Giants a few weeks ago and Carlos Santana by the Cleveland Indians last week, the Houston Astros summoned Jason Castro to be their starter in his second full professional season.

Castro was hitting .265 with a .365 on-base percentage at Triple-A, but he also had just 11 extra-base hits in 57 games. Last season he hit a combined .300 between high Class A and Double-A, with a .380 on-base percentage and .446 slugging percentage. However, much of that slugging damage came in one of the friendliest hitting environments in the minors, Lancaster in the California League.