In regards to Anderson vs Garza, I tend to lean towards Garza based on this grouping of players. There should be a larger emphasis on fastball effectiveness over having a plus slider.
http://www.fangraphs.com/leaders.aspx?pos=all&stats=pit&lg=all&qual=y&type=7&season=2013&month=0&season1=2008&ind=0&team=0&rost=0&age=0&filter=&players=0&sort=3,d
If we can get Garza without getting fleeced by Beane and actually buying relatively low on him by free agent standards.. Alex would salvage a lot of lost value.