The Pirates have a difficult decision to make this offseason when it comes to their 2018 starting catcher.

On one side of the debate, they have Francisco Cervelli. The current starting catcher put up a 3.7 fWAR in 2015, then signed an extension early in the 2016 season. He followed that up by missing time with injury, but still managed a 1.6 fWAR.

This year the injuries have continued -- a trend that has existed throughout his career, minus that 2015 season -- and he will finish the 2017 season with an 0.9 fWAR. He's being paid $9 M this year, and that's about the cost of a win above replacement on the open market, so his deal is almost fair value.

The problem the Pirates have here is that Cervelli will make $22 M over the next two years, and even if he produces fair value, they'r...

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