Career
He previously played in MLB for the Kansas City Royals. Kansas City Royals
Mariot was drafted by the Kansas City Royals in the eighth round of the 2010 Major League Baseball Draft out of the University of Nebraska. was added to the 40-man roster on November 20, 2013. He was called up to the majors for the first time on April 7, 2014.
Philadelphia Phillies
On November 30, 2015, the Philadelphia Phillies claimed Mariot off waivers.