Jeff Karstens has developed into a dependable middle of the rotation pitcher whenever he’s been healthy and should provide a lot of value on a $2.5M contract. While that durability issue that led to him being non-tendered could well be a problem this year and he's seen as more of a back end of the rotation option, I believe that Karstens now becomes a solid number three behind A.J. Burnett and Wandy Rodriguez in the Pirates rotation.
