DENVER – J.D. Martinez spoke for nearly 10 minutes Wednesday afternoon about not thinking. During Martinez’s initial two years in the majors, strong stretches would be erased by poor weeks. When Martinez’s numbers fell downward, the 25-year-old would worry, over-think and over-react. Not in 2013. Two games after going 0-for-5 with a franchise record-tying five strikeouts and one contest after striking out in the ninth inning without swinging his bat while a win was on the line, the Astros right fielder cracked the go-ahead hit during the club’s 6-3 victory against the Colorado Rockies at Coors Field. Martinez went 2-for-4 with a run and RBI, raising his average to .259 [...]