In the upcoming weeks, Francisco Liriano will be returning to the Pittsburgh Pirates' rotation, with his return currently anticipated for just after the All-Star break. The Pirates are getting good starts from their entire rotation, which will lead to a difficult decision when Liriano returns.

The current rotation consists of Gerrit Cole, Jeff Locke, Charlie Morton, Edinson Volquez, and Vance Worley. Of that group, only Locke has options remaining. However, Locke has some of the best numbers on the team, both in terms of ERA, and in terms of xFIP. Sending him down would allow the Pirates to keep everyone as a starter, but it would be removing one of their best starters from the rotation.

We know that Gerrit Cole and Charlie Morton are safe, as they should be. Cole has a 3.78 ERA and ...

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