J.D. Martinez wasn’t good enough to make the Astros out of spring training. An injury to Fernando Martinez and subsequent poor production created an opening, though, and an outfielder who started in 2012 for the Astros is beginning to show signs he can stick in 2013. J.D. Martinez went 2-for-4 with a two-run homer Wednesday in the Astros’ 3-1 victory against Kansas City at Minute Maid Park. A solid run during a recent road series against Detroit got Martinez started. The 25-year-old left fielder is batting .345 (10-for-29) during his last nine games with three homers, four doubles and seven RBIs. “He’s really seeing the ball well, and he’s a [...]