The Diamondbacks have injury issues in the outfield, so adding Heath at this time makes some sense. The 27-year-old Heath will serve as outfield depth for Arizona but is not expected to play regularly.

Since Heath had been designated for assignment recently, the Royals did well to land a future asset here in Herrera, a 21-year-old reliever who might eventually become part of Kansas City's bullpen.

There is not fantasy impact after this trade, as Heath is expected to serve a bench role in Arizona and Herrera is a few years away from challenging for a spot in the KC bullpen.