KISSIMMEE, Fla. — Six weeks after being suspended from baseball, Astros first base prospect Jonathan Singleton addressed the media Friday morning at Osceola County Stadium. Singleton was suspended 50-games Jan. 9 for failing a minor-league drug test due to marijuana use. It was his second failed test. Singleton has been in Kissimmee for more than a week. The Astros delayed Singleton’s media session so he could get his bearings. “I believe this is an opportunity for me to leave the past behind and move forward,” Singleton said. He added: “It’s time to show my true colors. … I’m an honest, up-front guy, so you’ll see who I am in the [...]