READING, Penn. — Wearing a bright red big-league batting helmet atop a black minor league uniform, Mickey Moniak looked more like a plot device than a rehabbing center fielder as he dug into the batter’s box on Tuesday morning. The sky was gray and the stands were filled with field-tripping middle schoolers and the second-place Phillies were a thousand miles away, but here in the leadoff spot was someone to pay attention to. A hero in the middle of his journey? Or a meaningless subplot? The fate of a season — nay, an era! — hangs in the balance. Or something like that. “I’m just trying to be m…
