IT'S WEIRDLY INSTRUCTIVE to watch how baseball scouts watch baseball players. Everything they do is intended to hide what they're actually doing, which has the unintended effect of making even their most subtle movements glaringly obvious. They also have another endearing quirk: They all know one another but don't want anyone to know why they're here, which is a particularly difficult feat when it's an independent Frontier League game on a 95-degree Friday night, the air wet enough to drink, and Kumar Rocker is pitching in Troy, New York, for the Tri-City ValleyCats. The scouts, more than a dozen of them, are here for just one reason.