The Arizona Diamondbacks have just announced a four-year, $40 million extension with third baseman Martin Prado. The deal goes through 2016, buying out his arbitration year this year and tacking three more on top. He made $4.75 million last season. His arbitration demand for this year was $7.05 million with the club countering at around $6 million. So one way to think of this is as a three-year, $33-34 million deal.
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