From the Dallas Morning News:

The Texas Rangers spent most of 2007 trying to build up the starting pitching depth in the organization. Friday, they put that depth to use.

The Rangers reached into their stock of young starters and used one, Edinson Volquez, to address one of their more pressing needs, the outfield. The Rangers, sources confirmed, have agreed to send Volquez and minor league pitcher Daniel Herrera to Cincinnati for power-hitting Josh Hamilton.