Miller will be Greeneville 's pitching coach for the third straight season after spending two years as a professional scout for the Astros ( 2011 - 12 ) .
Miller is a former Astros minor league pitcher .
Miller , a former Astros minor league pitcher , will be Greeneville 's pitching coach for the third straight season after spending two years as a professional scout for the Astros ( 2011 - 12 ) .