The Pittsburgh Pirates have had a lot of success with starting pitchers the last few years. The highlights have been A.J. Burnett and Francisco Liriano, who both had horrible surface numbers prior to joining the Pirates. Burnett had a 5.20 ERA in the two years prior to his trade, and Liriano combined for a 5.23 ERA in the two years before he signed as a free agent. Burnett has since posted a 3.41 ERA in two years with the Pirates, while Liriano had a 3.02 ERA in 2013.

There have been other starters who haven't pitched like aces, but who performed better than expected with the Pirates. Kevin Correia went from a 5.40 ERA in his final year with San Diego to a 4.49 ERA in two years with the Pirates. He followed that up with a 4.18 ERA in his first year with the Twins. Jeff Karstens slowly t...

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