Jackson Generals
Mather joined the Arizona Diamondbacks organization in 2015, and served as a coach for the Missoula Osprey in 2015 and 2016. He served as the bench coach for the Jackson Generals in 2017. He served as the manager of the Visalia Rawhide in 2018. He spent the 2019 season as the Diamondbacks minor league field and hitting coordinator.