It was Sept. 12 and Corey Seager had just erased any doubt he belonged in the major leagues, going 4 for 4 in a game against the Arizona Diamondbacks, when a reporter asked about his calm exterior."It's just kind of the demeanor I kind of have - try to hide as much as possible," he said. "Two older brothers, you kind of get used to hiding your emotions because they get under your skin pretty easily.