Jeff Karstens won't necessarily bump Jeff Locke or Kyle McPherson from the rotation. - Image Credit: Pittsburgh Pirates

When the Pittsburgh Pirates signed Jeff Karstens last week, a lot of people assumed they were moving on from Francisco Liriano. Now that the team has agreed to a revised deal with Liriano, the speculation is that Karstens will take the final spot in the rotation, pushing Jeff Locke and Kyle McPherson to Indianapolis at the start of the year.

That theory makes sense on the surface. The Pirates are paying Karstens $2.5 M. They usually don't spend a lot on bullpen arms, usually keeping it around $1 M. Karstens is also somewhat established, in the sense that he has had success over the last two years. Locke and McPherson are not established. It would make sense to assum...

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