As you know the Pirates are contending for the first time in almost 20 years. So, it makes sense that they are acquiring a bat to help them win.
The Bucos picked up first baseman Derek Lee to bolster their lineup and to upgrade their first base spot where they have gotten a .227 BA out of career .270 hitter Lyle Overbay.
The Orioles get A ball first baseman Aaron Baker and cash considerations.
A quick recap-
Pirates Acquire- Derek Lee, 1st baseman
Orioles Acquire- Aaron Baker, Class A 1st baseman