SOMEWHERE IN AMERICA -- "Ball!"
Prospect X faces one sideline and then flips his hips a sharp 180 degrees to make a back shoulder catch. He repeats that twice on each side, catching each ball his college quarterback sends his way. Then he jogs to the line of scrimmage and quickly takes up a ready stance. It's sunny and 70 degrees -- a beautiful spring afternoon at his home stadium, and his cheeks are already pink from the work.
"Take your time," the NFL coach says, his voice echoing through the empty stadium. "You're the only one out here.