Spring Training camps will be opening soon and rosters are getting some remakes. Astros signed one of those hot shot Japanese pitchers, who some have compared to World Series MVP, Yamamoto. Good start. HOUSTON -- Tatsuya Imai made his intentions clear with his first few words during an introductory news conference with the Houston Astros on Monday. The Japanese right-hander smiled before reading a prepared message in English from his phone. "What's up H-town?" he said. "I am Tatsuya Imai and I'm ready to chase a world championship. Let's go, Houston." The Astros and Imai agreed to a $54 million, three-year contract last week, bolstering a rotation searching for reinforcements after ace Framber Valdez became a free agent and appears unlikely to return.