Even Alex White acknowledged it. White won’t publicly disparage the Colorado organization. But he was willing to say the 2012 Rockies were a “bad situation” for him, for the team and for a starting staff limited midway through the season to an unorthodox four-man rotation on 75-pitch counts. White, 24, was the No. 15 pick of the 2009 amateur draft. The Astros strongly believe they stole the fastball-heavy righthander from the Rockies in the Dec. 4 Wilton Lopez trade. White was just 2-9 with a Coors Field-inflated 5.51 ERA last season. Everyone from Astros general manager Jeff Luhnow and the club’s scouting department to White himself believe better numbers await in 2013. “I love Denver; I love that organization. The whole year was frustrating for a lot of people,” said White, who allowed 10 home runs in nine Coors starts last season compared to just three away from the shadows of the Rocky Mountains. “Going in and out of a four-man pitch (rotation), stuff like that, those are a lot of things guys aren’t used to. … It was tough on a lot of guys, and it was just very frustrating.” A renewed 6-3, 215-pound White is high on confidence. Where most mid-level Astros starters vying for a back-end rotation spot have stuck to team-first platitudes during spring training, White has sounded like a major league starter since the first day.