Stros make another trade

The Royals have traded minor league catcher Edwin Bellorin to the Astros for cash considerations, tweets Bob Dutton of the Kansas City Star. The club promoted backstop Manuel Pina from Double-A to the club's Triple-A affiliate in his place. After spending the first six years of his professional career in the Dodgers' farm system, Bellorin was with the Rockies' Triple-A affiliate from 2007 through 2009. During that span he made eight big league appearances with the club. With Triple-A Omaha in 2010, the 28-year-old hit just .162/.231/.185.

This via

All I can ask is....WHY?