Former Kanasas City Star beat writer, and current Seattle Times writer, Bob Dutton tweeted the news:
The move followed an earlier trade in which the Mariners acquired pitcher Yovani Gallardo from the Baltimore Orioles in return for outfielder Seth Smith:
#Mariners acquire RHP Yovano Gallardo from Baltimore for OF Seth Smith.
— Bob Dutton (@TNT_Mariners) January 6, 2017
Nathan Karns figures to become part of the group contending for the Kansas City Royals no. 5 starter role this spring along with Chris Young, Matt Strahm, and Mike Minor.