The Royals were interested in Seattle right-hander Nathan Karns going back to the winter meetings, but the Mariners were reluctant to give up a power arm under club control through 2020.

That changed on Friday.

After the Mariners traded outfielder Seth Smith to the Baltimore Orioles for veteran right-hander Yovani Gallardo, the idea of shipping Karns away became a bit more palatable. So, the Royals and Mariners were able to reach a deal that sent him to Kansas City for outfielder Jarrod Dyson.